Personally, what interests me about this whole thing is the comparison to Microsoft's Kinect and the surrounding PR.
Valve: Here's our new controller!
Public: Looks like shit. Isn't that just a borked version of what we already have?
Valve: Alright, here's some footage of how it works in-game.
Public: Hey, that's pretty cool. It has potential at least. I'll have to try it myself to be sure though.
Microsoft: Here's our new controller!
Public: Looks like shit. Isn't that just a modified version of what you've already tried?
Microsoft: Alright, here's a tech demo of who it works.
Public: Hey, that's pretty cool. So, do you have any games for it to show us?
Microsoft: Uh.... EXPERIENCE! TV! TITANFALL! CALL OF DOG! TV! FOOTBALL! TV!
Public: Yeah, it's a few months before you sell it and multiple months after you first revealed it, and you STILL have nothing to show us? Sorry, not interested.