Yeah. LG's high end smart TVs have something called Magic Remote. It's no kinect, but an improved version of this might work well with an WebOS adapted for the big screen.
http://www.lg.com/global/magicremote/
I have one and it's awful. For one thing, if you have it sitting somewhere on your couch, any time someone else moves on the couch, a cursor will appear on the screen for 10 seconds or so because the remote will detect movement.