Ubisoft! I think they won by a mile. They had exciting new games that inspired and that you would want to play. It had the 'wow!' factor. And bravo for them!
Nintendo, Microsoft and Sony were all rather similar - a few new innovations, and a few updated legacy games. It should have been Nintendo's year, but so much 'we will not talk about that now.' And no screaming HD demos or 'you must have this' to show a consumer why to buy a WiiU over a X360 or a PS3.
But which one will I be using product and features of 6 months from now? Microsoft - Halo 4 and improved Bing, and the huge change that could be with table integration - especially cross platform. I think really have cornered the hard core/casual/accessible/versatile market.