There have been few hints in the past about a potential Adobe Lightroom version for the iPad (see here and here). In their latest presentation, Adobe showed content-aware fill on an Android tablet and paint mixing on an iPad that can be wirelessly transferred to your computer:
It seems that the direction Adobe is taking, is to use mobile devices as an additional tool to Photoshop instead of creating standalone mobile applications (they already have PS Express app). MacRumors showed some mockups on how those Photoshop tools may look on iPad and iPhone:
