The SkyDrive cloud storage service is due for a major makeover in the Consumer Preview, and part of the change involves single sign-on with a Windows Live ID. There are significant security implications as developers can "enable single sign-on and access a user's data on SkyDrive to make your Metro style app more personal -- with the user's consent, of course," as Microsoft puts it. Of course.
The Consumer Preview will give us the first glimpse of Microsoft's Windows Store. There's a particular twist here for the enterprise IT: The only way consumers can put Metro apps on their PCs and devices is through the Windows Store. (The only way WOA owners can put any apps at all -- or drivers -- on their devices is through the Windows Store.) At the Build conference last September, Windows president Steve Sinofsky said that businesses would have a private area in the store, which would dish out corporate apps, but only to authorized machines. We haven't seen any details of exactly how that's going to work -- and it'll be an important question for all corporate developers.
Microsoft has put us on notice that we'll see better and faster connections to Wi-Fi and other mobile networks, more adept power conservation, new and much more touch-friendly picture passwords, Windows to Go for running Windows 8 (presumably x86/x64) from a USB drive. Some of those may apply to your shop. Hyper-V will be available on x86/x64 machines, but it isn't clear whether the Consumer Preview version is in any way different from the Developer Preview version in that regard.