My rankings:
Microsoft: B
Didn't do anything but show tons of games. Announced a reboot of a totally awesome niche game (Phantom Dust) and a bunch of other stuff. The only negatives in my book were the CG videos being used instead of game play near the end and that damn Conker troll.
Sony: D+
Had a great start but slowly devolved into irrelevant comic books, movies, services, etc. Had some awesome looking games though. Uncharted 4 in particular was stunning.
Nintendo: C
Showed off a bunch of games, but didn't really announce much new. We already knew what was coming apart from Splatoon, that Toad game, Mario Maker (technically it wasn't announced), and Canvas Curse 2. Problem is all but one of those games seems to be a legitimately big production. Zelda looks good, but the overall game line up seems like it'll be empty without any third party support. I wasn't a fan of how they basically trolled their fans though with Mother 3 and Star Fox. It's like they know what fans want, yet just refuse to give it to them.
Also, the lack of 3DS was shocking. The future line up is basically empty beyond Pokemon ORAS and Smash. How are they going to reach their sales goals when they have such a sparse line up?
MS lineup was weak and at least in Nintendo Conference we saw gameplay and not just CGI trailers.
Fianlly, please read the forum, there're some 3DS annoucements like : Fantasy Life, SMT 4, Pokemon remakes and that's just for now.