Yep. There is no integration of WinRT or Metro with the enterprise. Windows Phones and ARM tablets cannot join an Active Directory domain. They cannot be remotely managed through Group Policy. IT staff cannot install software remotely (including AV) or fix trouble tickets using Remote Administration.
A typical desktop today has a 1920x1024 monitor, if not two. A Metro app hogs the entire desktop. It is not possible to run two Metro apps side-by-side on the screen.
From what I can see it looks like Metro apps can only be downloaded and installed from the public Microsoft Store. Large enterprises usually pre-install a suite of known and vetted apps from a central private repository.
So basically a Windows phone/tablet has all the disadvantages of the iPhone/iPad/Android -- no integration with the enterprise, no remove management, no domain control -- with none of their advantages of Apple's and Android's large installed base.
Microsoft's greatest strength is in the enterprise. Microsoft's failure to leverage Windows Phone with their enterprise advantage is beyond stupid.
NO integration with Enterprise for Metro....??
You gotta be sh***ing me.
How on earth does Ballmer keep his job...?