probably because the Paoli pneumatic wheel guns cost ~$7,000. (pit crew has 8 of them, primary and backup per wheel)
Couldn't find a modern price for the wheel nuts, but they're 1-time use and were a few hundred dollars each 10-years ago.

(edit)
From some tv show https://youtu.be/WvH3VN5Xr6s (edit/splice is easy to see @1:16 look at the scientist face who is in the room)
Wired article https://www.wired.com/2011/04/could-this-pneumatic-lab-prank-work/

according to planetcoaster forums, VR support is being considered for Planet Coaster.

As far as pneumatic chair, I don't think there's a consumer-affordable solution for that. (there are rumble chairs though, that can be programmed and most game engines support it)

Plug this in to a VR headset and a pneumatic chair and you'd be in for a hell of a ride.

Also, how great was the sound design in Aliens 1, 2 (SE) and 3 (Assembly Cut Obvs)? The maternal self destruct voice from the first movie never gets old.

Keeping a sealed pneumatic tube along the entire track? Sounds like a maintenance nightmare, to be honest. How do you switch rails? How do you get a stranded propulsion module off the track (can't just get a diesel locomotive to drag the thing, can you now)? What are the backup breaking systems for failures on those 10% grades?

I suppose this might at the very best be a niche thing, more so than the current Transrapid/Maglev system. Airport shuttles, maybe.

I believe it's going to be both, as implied by the [very brief] animation. It'll be a mag-lev train contained within a pneumatic vacuum tube or whatevs.

It's a maglev monorail? I thought this was going to use pneumatic tubes and stuff. I'm all for high speed rail, but I'm much more for Jetsons-style wooshy tube transportation.

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http://rraj.rsj-web.org/en_atcl/2088
There's a link to the original patent on this page above, it indeed works via pneumatic pressure in small air chambers within the rubber appendage.

It's not the size that counts but the motion of the pneumatic rubber microactuator appendages.

I'm pretty sure I saw this design or something similar a few years ago. Also, does anyone remember the Tweel? I first saw that about 10 years ago, and it was supposed to be the end of pneumatic tires on cars.

Quit trying to re-invent the wheel and give me the flying cars I was told I would be driving by now.

Very neat idea!

If you replaced the magnets with a non-magnetic material conductively glued onto the magnet, it would still work. From wikipedia on 'electromechanical solenoid',

Electromechanical solenoids consist of an electromagnetically inductive coil, wound around a movable steel or iron slug (termed the armature). The coil is shaped such that the armature can be moved in and out of the center, altering the coil's inductance and thereby becoming an electromagnet. The armature is used to provide a mechanical force to some mechanism (such as controlling a pneumatic valve). Although typically weak over anything but very short distances, solenoids may be controlled directly by a controller circuit, and thus have very quick reaction times.
The force applied to the armature is proportional to the change in inductance of the coil with respect to the change in position of the armature, and the current flowing through the coil (see Faraday's law of induction). The force applied to the armature will always move the armature in a direction that increases the coil's inductance.

Sometimes in life you gotta build little pneumatic dinosaur puppets.

This isn't an exercise in engineering so much as marketing.

The pneumatic motor is limited by the extreme lack of energy stored in compressed air. All inneficiencies in translating that stored energy into motion are failures in the system. The goal is to carefully remove all unnecessary sources of energy loss from the motor.

So there's an interesting engineering challenge in making this work 'at all' using Legos. There are design compromises that must be made, given the restrictions on form imposed by available parts; as well as the stress limitations of the material. It's like someone giving you a pile of reeds and asking you to build a Manhattan 5-Story Walkup. Can it be done? Is there enough stress resistance in the material for something of that scale? A fun challenge with no practical implications. Manhattan low-rises have been built before, you're not innovating architecture and you're definitely not contributing anything to the future of construction.

The question is, does it require a "technology genius" to accomplish? Someone tell me what a "technology genius" is first. Whatever it is...I suspect you don't need one on your team in order to search the internet for pneumatic piston motor schematics and copy/paste a parallel series of 256.

This exercise is inspiring and fun...until you add the marketing entrepreneur, casting hyperbole around and spending other people's money. It is unsettling to think that the new generation of capitalists are chasing the specter of Elon Musk; self promoting egotists who create nothing and take credit for everything. As a longtime member of the internet in good standing, I reject every stealth intrusion of marketing and entrepreneurship into my sandbox.

Hooray for Raul Oaida, engineering buff and hobbyist. Down with Steve Sammartino, marketer, entrepreneur, "brainchild" originator, keeper of secrete locations, crowd funder, project contact and fathead.