-The Windows App Store (roughly 4,000 Windows Store apps) does not have enough apps compared to the Apple iTunes store (700,000 apps) and Google Play Store (600,000 apps).

-The tile-based Windows 8 Start screen is confusing to users and there will be a learning curve to get employees up to speed on the radically different Windows 8 user interface.

-ARM-based Windows RT tablets lack the computing power and legacy app compatibility to be a stand-out enterprise tablet.

is the Assistant Managing Editor for CIO.com. Follow Shane on Twitter @smoneill. Follow everything from CIO.com on Twitter @CIOonline and on . Email Shane at soneill@cio.com