Games -- pure and simple. Until recently, what was available in true next-gen? The PS3 is finally beginning to build a library and I think the RROD is going to haunt MS going forward to some degree. That said, there is still a vast chasm of difference between the game library on the 360 and the PS3.
Because of the huge headstart and the strong 2007 software library, there is still a very compelling reason to get a 360 -- even with the risk.
That's what this is supposed to be about, isn't it? Games?