Suppliers and evangelists are enthusiastically promoting the wholesale migration of corporate IT into the cloud; what appears to be a simple suggestion hides a set of complex trade–offs.

It’s true that mobility continues to grow, that we are enthused by new consumer technology, and that work and play are not sharply distinguished. At work we are increasingly demanding the ability to access our applications and our data anytime, anywhere, quickly and easily, and from the device of our choice.