The only thing I'm really interested to see out of this is Forza Horizon 2. Playground Games did a fantastic job with the original game. If this turns out to be astounding (and unpolluted with the "paymium" model that Forza 5 went after), I might have to get an Xbone just for that.
Aside from that, ehhhh.
Halo, Gears, and Crackdown are not exciting because these are not being made by the teams that made the original games great. I can't get hyped for sequels done by unproven teams.
It would be a neat novelty to play Halo 2 again, but there's no way it could live up to my memories of playing the original with all of my friends and meeting plenty of other people in town through playing online with them.
And QB & SO, those games need to be shown off more so I can see what the hell those games actually play like and if there's a chance in hell those teams can actually execute on their lofty ambitions.
Maybe I've just grown past getting hyped about these kinds of things, but I really just want to see the end result before getting all that excited in situations like this.