>>281918426
It's cool that they got it working on a standalone headset and all, but it's not like this is anything new. You could do stuff like that with a Leap Motion back in the DK2 days, and HTC had it working with the Vive's built-in camera last year.
Playing an actual game with no sticks or buttons and no feedback isn't really a good experience though, so just having finger tracking and nothing else is kind of a dead end for now.