and the difference is what?

im sure the phone parts of android can either be turned off or used in combo with a voip service.

google would be stupid if they dont make this as flexible as they can get away with, for use in future product branches.

how about if they can turn it into something for a mid/tablet/set-top-box?

done right this could be made flexible enough to be used for anything from phone and other handheld devices to simple computers. hell, phones today are simple computers.