The filament style of 3d Printers are cheap to operate and can be made to nearly any size.

A resin printer needs a photopolymer, something that solidifies when exposed to UV light. They also need a fairly strong projector and lens, which limits their build area.

A filament printer can use a lot of various materials, the most common being PLA (a bioplastic made from renewable plant materials) and ABS. There are many other materials, some are specialty that have an almost rubber like flexibility to them, to a filament that is made from wood and a binder, which results in an printed object that can be sanded and stained. And, since you are moving a print head, the only limitation to the build size is how big you have made your printer.

It's not just changing the charger, that's usb-c which is also the video output. So if your conference rooms at work use projectors or flat screens...yay, one more video adapter to stock for those important meetings when the presenter doesn't prepare and realizes at the last moment that she connect connect.

The Ti DLP chip is the most commercially successful MEMS device created. I own a DLP projector(720p) and a rear projection Mitsubishi DLP TV (1080p). I like that DLP chips can give you 3D (in a checkerboard pattern) basically for "free", and it looks better, IMHO, than other 3D displays which also use active-shutter glasses.

Some nitpicking - most home DLP projectors use a 6-color wheel, not 3.

He also didn't mention that most digital movie theaters use DLP - although this is a a more expensive system, because there are 3 light sources and 3 DLP chips (RGB) instead of having a color wheel - and they are larger chips with more mirrors.

Great timing on this video. I just ordered an HD DLP last week. I should have it in 6-8 weeks, as I live in a 3rd world country now.

I was shocked they had highly rated SD DLP projectors for LESS THAN $100. I went with the $600 true HD version though with 20x more light output.

But this video also really helps me further conceptualize and realize my solar powered death ray. I want to have a 10,000 one inch mirrors hooked to independently, hyper accurate micro-servos, then have the whole array on a large servo controlled panel that angles towards the sun. With the right control logic, you can have 10,000x the power of the sun focused onto a single, movable, virtual target 1 inch in size. Hot.

What they're showing certainly is ridiculous, but I'd be pretty happy with a monochrome green projection. That said, in all likelihood some sort of flexible OLED patch or wrist band would probably be practical long before this is. Probably even some sort of fluorescing tattoo.

I do like the possibilities of short throw pico projectors combined with machine vision for user interfaces though. You could take Newtboy's dual projector concept and have something the size of a couple marker pens that unrolls like a scroll, with the screen in the middle.

When it comes down to it, though, what I really want right now is something about the size of a smartphone, with minimized thickness an e-ink display and a limited feature set (phone, text, e-mail, and basic web surfing), the whole design optimized for battery life and performing just those four functions adequately. An easily replaceable battery would be nice too.

The shadow could be solved with 2 bracelets projecting, one from the wrist, one from below the elbow, or maybe even just 2 projectors on the wrist separated enough to compensate for finger shadows. Now we just need a miniature terminator power cell and a few years of miniaturization of cell phone circuits and we're there! ;-)

It's a brilliant idea, I'd patent it. I believe it could be done (there are projector modules that would almost fit in their form factor), but only at an extraordinarily high price and with other major shortcomings like power usage that would need to be overcome.

Also, the unavoidable shadow your finger would cast but which they leave out of the mock up videos would be a problem.

My thought was actually to have multiple projectors per block approximately 10 feet up (building mounted) with sensors to identify people and have them 'place' a smallish ball of light at about 8-10 feet up that floats above and in front of them, but with much less light needed than a 'street light'...and maybe stationary one's in intersections (these could even have 'covers' to stop wasted light from going up). Or, it could project tiny lights (like in the video) near ground level to illuminate the sidewalk, but that's not as useful by far.
By my estimation, there could be less pollution because there would be fewer, smaller lights on at any one time (where normal lights are just ON all night). I agree, there are many issues to solve, but it's doable if thought about thoroughly.
It's a little too late to worry about 'light pollution'...in fact I bet it's not on the average person's radar. Sadly, many people in cities have never seen stars at night and don't have a clue how much is hidden from them. (I live in the boonies of far N cali, and we still have light pollution from nearby towns, but nothing like in a city...I've even watched the international space station get re-supplied while sitting in my hot tub! That was amazing!).

POSH Donkey Kong Projector Wedding Cake has been added as a related post - related requested by oritteropo.

*related=http://videosift.com/video/POSH-Donkey-Kong-Projector-Wedding-Cake

I quite like the aesthetic the white dots create. Brb, gonna tipex some on right now.

I wonder if the projector can black out the eyes well enough that you could open them without being blinded.

Major Lazer - 'Get Free' ft. Amber (of Dirty Projectors) has been added as a related post - related requested by Zawash.

*related=http://videosift.com/video/Major-Lazer-Get-Free-ft-Amber-of-Dirty-Projectors

If the next-gen console games supported keyboard and mouse, I would have bought one. It's up to the developers to include KM control, but most don't - citing that it would be unfair in online multiplayer. I think just having a flag/tag that users could search for "gamepad only" online servers would solve that problem. I think there were only 2 PS3 titles that supported USB Keyboard+Mouse (Unreal Tournament and something else). Or even if they allowed KM for single-player campaigns, games like Killzone and Resistance would have been much more enjoyable to me.

So I upgraded my PC to an 8-core AMD FX-8320 + 16GB ram + GTX 750 Ti for less than the cost of Xbox One. (my projector's only 720p, so don't need a high-end GPU to get good framerates)