I tried a HDTV for gaming. Kinda negates gaming on one because you have to sit so far away to see the picture right. Stick with a pc monitor. That's what they're made for.
Agreed I'd rather play on a monitor instead of a HDTV. Best you do that. And don't go wireless. The response time can be too much. Best you get a wireless in a HTPC rather than for gaming. Use cable as all others suggested.