Not entirely sure what to make of this E3 so far.
As a predominately 360-focused gamer of this generation - what I will say is I'm not getting an Xbox One. I never believed that showing a few really inevitable titles was going detract much attention away from their cruddy policies, and now Sony have gone down the opposite route regarding the key issues - Microsoft basically set themselves up for a 'meh' to disappointing reception. On a related note, why was Master Chief wearing a robe in that piss-poor teaser? Wait to differentiate from Destiny and all the rest 343.
I don't think I saw much from either that screams 'next-gen.' But a PS4 seems like a good bet for me, at some point, largely because it seems like the most straightforward system of the two (or alternatively, it pissed me off the least.)
I wasn't overly impressed with Nintendo's E3 basically because nothing they showed really had that wow-factor. It was solid. We did see games that fall under the 'AAA' bracket - but still, a taster of Metroid or the next Zelda would have been great. I hate that Super Mario 3D World is so stylistically similar to the 3DS game - not exactly breaking new ground or venturing into new realms like Galaxy did. Same goes for that new Donkey Kong Country game - why do we see so many games of the same nature released in a sequence from Nintendo, the New Super Mario Bros series seems so bland to me partly because there's been a lot of them. Likewise, now I feel like there's been quite a few Donkey Kong platformers churned out in a row. Although I do like the thought of a HD Country adventure, its effect is definitely diluted when it comes in a sequence.
Despite those qualms, a Wii U looks a lot more appealing now than it did a couple months ago. More remakes and regurgitation in Wind Waker and Smash Bros/Mario Kart 8, but it adds quality to the system. Lots of people talk about giving up on the upper 'next-gen' systems and getting a gaming PC. If Nintendo get competitive in their pricing then they could have a slice of that particular pie.