I have tried apps that turn my ipad into a wifi touchpad for my PC, and they work quite well. Coupled with an Adobe Ink pen and an app that loads a section of my PC's display (running PS or LR.. or Illustrator too!) and bam, you've got a pressure sensitive pen display you can edit on directly. Without handing a mortgage payment to Wacom. Any thoughts folks?
I kept asking this too and nobody seems to have tried it. I bought the ink and slide and am in process of getting an ipad. I want to use Duet Display ios app which allows you to turn the ipad into an external screen for your mac as a "poor man's" Cintiq display.