Welp.
Microsoft - 4/10
EA - 5/10
Sony - 6/10
Ubi - 8/10
Nintendo - 2/10
As mentioned: No Retro. No Zelda. No 3D Mario. No Mario Kart. No Smash Bros. No Star Fox or F-Zero. Few new 3rd party games. In fact, no megatons of any kind. Nice hardware, a clear step up from current gen hardware based on their 1st party games, but it's hard to know how many 3rd party games will take advantage of the boosts the hardware provides (vs lowest common denominator development). Most of the controller screen uses are gimmicky...but they will be gimmicky. Anyone who's used a DS or 3DS knows ideas tend to be limited there.
Final Nintendo score depends on what they do at the 3DS show, but wow. So underwhelming. Snatching defeat from the jaws of victory.
Ubi clearly had the best conferences and the best collection of games. Sony showed some really interesting NEW IPs and the rebirth of some old ones. Not great, but sufficient. Everyone else could have stayed home.