The real impetus behind these three iPad apps from Adobe is to demonstrate proofs of concept for the new Photoshop Touch SDK, which will enable developers to create apps for tablet devices running Android, BlackBerry OS, and iOS that can drive Photoshop in a client-server manner. These really aren't intended to be standalone apps, though Eazel comes closest to an independent art tool; for that, Adobe still offers Adobe Ideas
and plans to keep developing standalone apps
The Touch SDK will be free to any licensed user of CS5, downloadable from Adobe Developer Connection
. Though I haven't yet seen the documentation for the SDK, as far as I can tell it supports any operation that can be scripted in Photoshop.