Despite their major investments a lot of the studios you mentioned are expected to be smaller studios. 60 man studios are not big enough to create a major AAA block buster title efficiently. You need a bigger team to deliver such a high quality title in such a short period of time. Rare has roughly 200 developers and they haven't made a big AAA game in years, with that big team and even bigger in the past it still took them years to deliver high caliber software. LionHead also has hundreds of staff.
Lets face it these new studios aren't going to be bringing us the next Gears or Halo. If they have less then a hundred employees in total the best we can expect are casual based cheaply made software.
MGS Vancouver looks promising though and so do some of those mentioned. But many are not indications at all that we will see amazing games coming to Nex-Box. At least not to many more then usual.
Actually scratch that considering Microsoft began next generation software development in 2008, expect their to be a massive wave of high quality software for launch of the NextBox. But it won't be completely due to these guys.
-JC7
"In God We Trust - In Games We Play " - Joel Reimer
