For me is was disappointing.
E3 is meant to be the big show that is meant to surprise us. We wait 12 months for it and we should be wowed as they talk up the event as the gaming event of the year.
Microsoft got me some what excited and at least peaked my interest in how they handle next gen.
Sony, wasn't great but we are at the end of a life cycle and it showed solid games.
Nintendo being in it's second year very disappointing. I do not hate Smash but like common the presentation was bad. Most of that info should have been in the treehouse section of the event. They needed to wow us about the future and that is what was lacking. Sony managed to do that when they launched the PS4 and hence why and many others own one and not an xbox this gen.