The Next generation game platform for the X-Box. The graphics look only slightly better then The X-Box (Unlike the PS3 which takes graphics to the boundarys of games. Gameplay looks like a freaking CG movie!!) but the X-Box 360 has more features than the PS3, but anyone that saw the Killzone 2 trailor would agree, PS3 takes the cake.
(BTW, I know that the Killzone Trailor wasn't really on the PS3, but it is what it will look like)
X-Box 360 will push gaming to a new level, but the PS3 will push it even further, and no one really knows about the Revolution, so I'm not saying anything about Nintendo.