MS announced that they are getting seconds on a game that won't be out forever, and that beat Sony? Hmm. I don't think so. At least Sony had some interesting new stuff to demonstrate that they are hard at work at making *games* on their console. MS had nothing new whatsoever, except cheap ripoffs of SingStar and Miis. I call that the definition of boring.
Nintendo's presentation was... I dunno. Different. Just went on to show how different the Wii and HD consoles are, as far as I'm concerned. I liked seeing all the new gimmicks they come up with for the Wii. I can't really "place" it in with the other two presentations. It was just different.
Next year (I'm gonna call it that far in advance), MS will announce their new MMO shooter game, with a Halo theme, show a CG trailer, and the crowd will go wild. Mark my words.