It would be cool to see jPCT go Android. Though I don't know if any of the current users would make a lot of use of it. Then again maybe it would bring in a new crew of people and interest?
Though honestly jME is the LAST Java 3d engine I would put on Android(Except for Java3D). It's bloated and a heavy weight game engine. Android would need a lean and mean version of a SceneGraph or something similar to jPCT. I also wouldn't consider Ardor3d, or Ogre from the CPP entries. These are full fledge apis, not something you can shoehorn into a small portable device just because it has OpenGL ES.
I dropped jME because of it's heavy weight for webstart and applets. If I ever do a full size PC like game. Then yeah I would probably go to Ardor3d or jME. But for smaller, leaner, meaner games. jPCT all the way.
Personally I don't like the answer given for development time. Though the idea has merit. However look at the state of game development companies of Blizzard compared to any other PC developer. It's clear Blizzard doesn't consider "average" future computer a valid enough of a target. If theres complaints about that, then theres more than enough evidence to show that Blizzard does better than most other PC game developers in regards to profit per product. I think it would better to assume current average now, then that becomes the minimal standard after development time. ( my sister in law STILL plays Diablo 2. And she doesn't like any other PC games or VG violence.)