Yeah, Project Shield will do this, but I already have a HTPC, any way I can 'stream' or whatever my PC upstairs to my HDTV downstairs, grab a controller and enjoy me some steam games on a bigger television?
I know this is likely very possible, but I can't think of a program off the top of my head. Shame that VNC is slow and doesn't work at all with most games.
Personally, I would just punch some holes through the floor and run a video cable and a usb extension down there, but I'm rather more comfortable with punching holes in my walls than most folks.