I don't know about iDevices, but this is very much supported on a lot of Android phones. Samsung's lineup even has it as a bullet point feature, and they sell d

I don't know about iDevices, but this is very much supported on a lot of Android phones. Samsung's lineup even has it as a bullet point feature, and they sell docks which let you connect your phone to a screen, peripherals, and switch to a mouse-oriented UI without having to do _anything_ weird. At that point, you're running a mouse-centric, multi-window OS with a wide array of software, that can run basically whatever you want. So that's a computer, definitely, right? When does it stop being a computer? If you disconnect the display? Is it using a stylus instead of a mouse? Maybe the software keyboard instead of a hardware keyboard? (But then is the MS Surface not a computer when you detach the keyboard case?)