The physical nature of the device needs to match up to human abilities and needs: so I always ask questions about visual angle, resolution, pointing, drawing, typing, extensions of the hardware (especially via software), capacity, speeds that match to human nervous system, etc.

The software nature of the device also needs to match up to human abilities and needs: so I always ask questions about the GUI, how does it help in learning itself and other things, what kinds of things can I see and contrast and compare, what kinds of things can I do by programming, what kinds of things can kids do by programming.

And so forth. What do you think?