I guess if you're going with hardware numbers you'd have to say the Wii technically "won." But you can't call half of the crap on the system games. Metroid 3 was good, and I do love Wii sports, but I thought it wasn't generally a step forward for gaming in general, more of a step sideways.
X360 is my favorite system, it has my favorite games and I think the best online platform of all the consoles, despite the fact it's 50 bucks a year. Great media capabilities, great graphics, and seems specifically tailored to playing games unlike the PS3 sometimes.
PS3 is a phenomenal system that was unfortunately the victim of several design missteps from the beginning. Basically inserting the Cell chip which was designed for media display, and not really systems and simulation execution, turned out to drive the cost up where they could have just dropped a prototype C2duo in there and it would have blown 360's away, and keep the development tools relatively easy to use, which is another drawback it has. Although it has some great games and Blu-ray turned out to be the best idea, and the standard hard-drive is something I thought was very important and a HUGE drawback for the 360 for not including one standard.
If the PC could get some good developers back it would be the best. So far you've got Crytek and Blizzard essentially keeping it on life support.