(keitai-l) Java in mobiles

Anybody knows exactly what it means, if the next generation of
mobiles are Java powered? Does it mean, that there is an download
option IN the phone to download new full blown applications on
the handset? Or does it only mean, that the internal software is
made with Java and there is no chance to put your own application
into the phone (except you know the manager of the Sony Phone 
department and you can drink much more than him...)?

Just curious: Juergen