Tablets need their own UI - which involves screen touch and other idioms - you don't touch your screen on a computer!
In fact the bullpen next door to my office is filled with illustrators who spend their days, every day, touching the screens of their computers to get their work done.
Sorry. Reality can be an inconvenient thing. Particularly where it trashes over-broad sweeping generalizations about how people use their equipment.
Carry on.