Nobody won IMO, it was pretty bad.
When the reason people think Sony won e3 is the price of the Vita, something is wrong. Sony had a good presentation but just more of the same. Xbox 360 was embarassing with kinect.
I really hope that the Wii-U is more powerful than what the games shown are doing. The demo looked better than anything available right now, but it's just a demo. The actual games looked no different than the PS360.