Being a "phone" is easily a subset of any mobile computer. Given the software and hardware, it's trivial. Android is Google's idea of "mobile computing," and it's not at all unworkable.

Manufacturers don't like playing second fiddle to Google with respect to control over the OS. With MeeGo, much like the kernel, they are on an even playing field with others.

That and drawing on upstream projects for subsystems means each smaller part gets much more focus than when the whole thing is built from scratch by one group.