E3 is like the presidential election. They talk a lot, show 'screen shots' of how things 'will be'. They lie to you, but make it sound very believable. Then everyone is like 'Yay, company x won E3 because of the potential of what they said!'
The truth is, with E3 or the presidential election, no one really knows until well after it's over. Fortunately for games, if a once-thought winning company doesn't deliver, the other 2 are still there. With the president, if he doesn't deliver...I'd say we're fucked, but most of them never do and we're still alive for now..so hmm.
I don't get the 'So-n-So won E3..' I guess it creates good debates though.