In case you tv isn't big enough...just turn your entire room into the screen.
http://www.theverge.com/2013/1/9/3855826/microsoft-illumiroom-projection-demoA whitepaper documenting this was leaked a while back...didn't pay much attention to it, thinking it was just a crazy idea some engineers in Redmond had. Apparently they are serious enough about it to release a video and will demo it in person in April.
So, wondering how much tech this would require? In addition to the Kinect, I would think multiple projectors and an additional computer/system generating the projections.
I'm not sure I'm hardcore enough for this shit anymore.