USAF
To give you a little more insight on the Win8 situation, I'll talk a little about the U.S. Air Force. Typically the USAF upgrades to the latest version of Windows immediately. Heck, they were still doing some XP->Vista upgrades when they started the Win7 upgrades; that's how fast they move. They don't wait for SP1 or anything like that. The USAF is heavily in the MS camp for the desktop as is most of the U.S. Govt. (It is the core of what they call their Standard Desktop Configuration [SDC]).
Not so with Win8. There are no plans to upgrade anytime soon. First, some of their core middle ware doesn't work with Win8. Then there is the whole training issue. Training hundreds of thousands of troops is no menial task even for the USAF. When you jump the tracks as far as MS has with Win8, they're finding that even their hardcore clients are not real happy and are considering skipping this one.
