Graphics in OpenMW are based on OGRE, which has/will soon have an OpenGL ES renderer. So one big hurdle out of the way.
Also, the original Morrowind seems to be coded somewhat sloppily, so the OpenMW developers expect that they'll be able to target even lower-spec hardware than original Morrowind did, which does bode well for the Pandora.
But the biggest hurdle is the fact that OpenMW is nowhere near playable. They just came out of a major rewrite and are currently able to load and display models, and I think that's about it. So first let them get the game working on PCs, then we can worry about Pandora.