Microsoft C- (Halo 4 and well...apps)
Sony B+ (Last of Us and God of War look incredible, plus a few other exclusives I am forgetting to mention. )
Nintendo B- (Controller is excellent and Zombi U looks very cool) They played it safe.
Ubisoft A (Perfect host, Watch Dogs and Ass Creed 3 ) Would have liked to see Rainbow Six make an appearance.
EA C+ (Really excited about Dead Space 3 and Crysis 3) Pretty boring overall though.
I was ready to crown Nintendo, but there were no killer first party titles announced. Sony did well (though the Wonderbook part was so awkward), and the Playstation Plus incentives really impressed me. Ubisoft stole the show. It was made so much better by the removal of Mr. Caffeine.
Of the big three, Sony wins.