I briefly fucked around with it, and wasn't too impressed. But I was a dick about it, and tried testing out Sleeping Dogs at 1920x1200, streaming from my HTPC (which is basically a desktop PC, i5-750 w/ 670GTX) on to my actual desktop (i5-4670 w/ 680GTX). I didn't screw around for more than a few seconds because it was herky jerky as all hell. Not just a low frame rate, but jumping all over the place. There was also a warning message that my network had high latency or low bandwidth or something, which doesn't really make sense as it's all cat5 w/ a gigabit switch and router.
Neat idea, but I'm not sure how viable it will be for any "high end" gaming. If it was then maybe I'd consider ditching the beefy HTPC for something quieter and cooler, but that doesn't really seem like an option.