yeah it's like everyone died or something the tl;dr version of all of this is that david cage wasn't there :<
I haven't seen everything of ever conference but this is basically what happened. If i forget it it probably isn't that notable/memorable
==Day 1==
Nintendo World Championship/Smash Direct. DLC for Lucas was released, also for Ryu and Roy. Sakurai shows off his amiibo collection. Earthbound was released on the Virtual Console (only on Wii U). Metroid Prime Blastball was showed off during the championships. Also, vampires win.
Bethesda's conference. Doom had lots of gore and fun and hell. Dishonered 2 is a video game, has 2 different main characters. There was some kind of class-based multiplayer game with cell shaded graphics, so basically TF2. There was probably some other game. Then there was Fallout 4, it looks like every other Bethesda game except **next gen** (also crafting). They also released a little iOS game that doesn't look like every other Bethesda game, but it's essentially a social game without the social aspect or timers.
==Day 2==
Microsoft's conference. Halo 5, Xbox 360 backwards compatibility, a different controller which some customization, some indie games (not gonna lie but Cuphead was the only thing that looked notable in all of this), Rare is making a compilation of 30 of their games, (they advertised Nuts & Bolts support, don't worry), some pirate coop mmo from Rare, and I think that was about it??? oh yeah there was also tomb raider
EA's conference. There was a guy showing off his little game, Unravel; he was a little emotional and really excited and nervous. In terms of things that were really different compared to There was also sports and Star Wars.
Ubisoft's conference. Never got to see, but there's a new South Park game. I'm assuming there was also Just Dance as well, knowing Ubisoft
Sony's conference. Sony's was really weird because they never spent time to let any of what they said or announce sink in, and they definitely announced a lot. Notable ones were The Last Guardian, dreams by the Little Big Planet/Tearaway studio I think, anime Final Fantasy 7, Shenmoo 3 kickstarter (anime) and Final Fantasy 7 HD (even more anime, and also probably not a ps4 exclusive). Also, Nathan Drake is good at standing.
==Day 3==
Nintendo's conference. I never really saw it, but people keep saying that it's bad. I can finally dress up Link in little costumes, and AlphaDream is making another Mario and Luigi game, featuring Paper Mario from the Paper Mario series. Hyrule Warriors is being remade for 3DS for some reason, and has kings that turn into boats. There's a new Star Fox game with elements from the rest of the series, and Platinum Games is co-developing it. Xenoblade Chronicles X and (Super) Mario Maker have release dates. SMTxFE still looks nothing like SMT or FE. Also, Metorid Prime dorks are disappointed that Retro Studio's next game isn't really a Metroid Prime game. The conference doesn't really look bad, just underwhelming compared to last year.
Squeenix. No clue, never watched it.