hmmm, so what exactly is the point of the curved net?

Probably to stop the players or slices on the table from shooting directly at their closest opponent. I imagine they have to try and shoot towards an opposite slice on the table or something like that.

That is so lame.
I don't find it fun or cool almost at all.
To play in the way they're doing in the video the traditional rectangular table is obviously better . Yeah , maybe not to play 3vs.3 (I'm not a big fan of doubles , let alone 3 players for side).
Though that circular table would be good for a trivial version of table tennis you play in many players conterporary , running around the table(we did it anti-clockwise). It's kind of childish , but with that table it would be perfect (to begin , more safe : I can remeber crashing my leg on the angle while trying to run fast and be on position ) .

You may find the videos of Hexapong a little more interesting. Hexapong has 8 different games, 3 different net configuations and can accommodate 2, 3, 4 or 6 players at one time depending on the game played.
Hexapong is NOT ping pong and is NOT Table Tennis. While the recreational players have no problem on this table the Table Tennis Elite are only comfortable on a traditional table and only very few get out of their comfort zone to try Hexapong.

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The duration of this video has been updated from unknown to 20 secs - length declared by Mandtis.