If you only wanted to watch movies and TV, you could do this over wifi with an HD media streamer (I am assuming you have wifi).
To view the actual desktop would be more complicated though.
You could do it wirelessly with this:http://www.gefen.com/kvm/dproduct.jsp?prod_id=4318
Or you could do it over twisted pair with this:http://www.kramerelectronics.com/about/ ... ?iNews=568
You are into $500+ dollars either way, and the second option assumes that you have twisted pair Cat5 or Cat6 already run point to point from PC to TV (note that it is not an ethernet based system, thus you cannot run it through routers or power line networking adapters). Also they do assume that you have audio piggy backing on the HDMI signal, which since you only have DVI outputs you would not be able to do, and would need a video card that will offer you HDMI out.