I think a 12" transforming laptop/tablet would be an ideal size for a student.
Fingerprints.
I wouldn't use the touchscreen in laptop mode, only in tablet mode.
Operating System:
Hopefully the OS automatically switches from a traditional laptop screen to a tablet mode. For example, in laptop mode I'd like my e-mail to be something like Outlook, but in tablet mode I want a more simple interface and I want the program to be able to switch, automatically, while still ON and running.