The one and only answer is Wii. It made every other console introduced motion controls and is one of the reasons idiotic terms like "casual" and "hardcore" are so widely used. And made alot of non gamers play games etc. it is the one console that shaped the other consoles the most and thus shaped the generation the most.
the 360's main feature is xbox live which was introduced with the original xbox. One could also say the 360 introduced HD gaming when you exclude PC gaming from the generation. The 360 also made achievements popular right? (well i dont give a f about those... but still)
The PS3 on the other hand neither came up with online nor did it come up with motion controls or HD gaming or achivements. The Ps3 is a basically a PS2 with bluray support which actually has not much to do with gaming.
Edit: The Ps3 made for a good number of laughs because of some funny "fans" ( just look at this POLL for example :) ) and it had the OUTAGE!
