Ubisoft. They make the most amazing games and Microsoft is more interested in turning your house into an expensive, overly-complex shambles of devices all doing the same thing. I personally never really care much about Sony or Nintendo, but I'll listen if anyone tells me they revealed something interesting.
No one really won it imo. This year for me has been more about me watching the live shows to see the game demos and the discussion about them with the devs. Sony, Microsoft and Nintendo were all a little ordinary for me technology wise.
I respectfully decline to vote for any of those companies, as they have nothing to interest me.. With Nintendo breaking traditional protocol, among other things.. I would only really vote for gamigo and 3rings/sega. gamigo for making the mmo from one of my stories growing up and 3 rings for their Doctor Who mmo.
Ubisoft by far the best! With Sony on the 2nd place, I really don't get it why people vote EA. Think there are some fanboys voting as well.