Here is a very nice video on what could be the User Experience in the years to come. It has been strongly influenced by the iPhone of course but some concepts are pretty interesting like the extend-able screen.
Another very good source of mobile concepts is Nokia, especially its morph concept based on (future) nano technologies. The device Industrial Design is no longer stable but evolves according to the user needs. What is really cool is that Nokia explains the technologies behind these wonderful features.
Can’t wait to play with it! Get me a time machine!