I think we are now getting into an area where is iPad is a bit over matched. I feel the iPad is a limited "creation" device and personally believe photo editing is one area that belongs on a platform with full capability, utilizing a properly equipped laptop or desktop.
Yes, I agree. But based on what i see in the Adobe Ideas app they created. They could come up a useful "light" version of Photoshop that could be quite useful. As a long time Photoshop user, I would be interested to see what they come up with.