In the recent CIO Article Windows XP: The Microsoft OS That Just Won't Die there is a great quote:
"Were this Apple, you wouldn't have the option to use an old OS at all. Granted you probably wouldn't want to, which speaks to the problem here."
Still though, I’m hopeful that the beta build will produce the goods.
In the meantime here is some of the public {enterprise} information I’ve read to date:
Example Business rationale: