"Turn-based" and "strategy" are two terms that usually make me zone out and start staring out the window out of boredom, but I'm really curious about XCOM. I think it's the action figure/playset aesthetic that the game's got going on. It seems more like playing G.I. Joes in my backyard than getting stuck in a seven-hour game of RISK.
Brett put up his preview of it a few weeks back, and you should go check that out too.