Why are people saying Nintendo won? As much as I love Reggie/Iwata, I don't love the console or the games and I saw nothing in their media event that made we want an Wii U. The only reason I'd ever buy a Wii U so far is just for LEGO City Undercover, and that would be just to extract files so I can port it to the PC (completely possible, btw).
Sony won, even with their CEO's TV fascination.
Even if you don't believe me, we can at least all agree that PC lost E3 because nobody cares to hype PC gamers up, least of all being Valve.