(Another thead turns into a Java-on-consoles topic. LOL
Surely it's only a matter of time before Java will penetrate other devices. It certainly has penetrated mobiles. And the mobile phone has every intention of becoming the consolidated, always-worn, games console, personal media player, PDA device.
Notice how all of the established games companies are moving into mobile. All of them are announcing mobile game divisions (forget Tetris - they're thinking much bigger). They're all following the same roadmap - form the management team now and start recruiting Java game developers in late 2006 (which is when programmable hardware accelerated 3D devices are due).
Admittedly it still remains a potential future technology, but given the entire gaming industry (an incredibly narrow-minded bunch) is seriously making moves, I find it difficult to dismiss that potential.