I haven't played any new gen consoles except for the DS.
However I do have my sights set on a PS3 for a few reasons:
1- Free internet features such as multiplayer for most games.
2- Blu-Ray
3- All good games on 360 will see the day on PC, which I also own(and prefer over any console)
4- The upcoming library of games, including FF13, MGS4, KH3 and many others, in addition to the multi-system games.
5- Sixaxis is motion sensored much like the Wiimote but not as good. Still, it's better than the 360 imo.