This nifty little USB TV tuner from Adaptec Japan is designed specifically to allow you to play console games on your PC. The GameBridge TV (AVC-1410) connects to your PC or laptop and lets you play, record and replay said games as well as watch standard TV. They may call it a game bridge, but we really know this is an "OEM USB TV-tuner dongle." But anything to sell product, right?
Electronic Gaming [CESweb]
DISCUSSION
the new eyeTV has some game software that allows games to be in real time. So that should work for you.