Actually, I would be really interested on research done in this area. What are some modern UI concepts (apart from those oh so usable interfaces offered by this big fruit company)?

Are there any fresh concepts out there at all? I would really like to see what might be possible if somebody really starts developing something radically different and well suited for the novice computer user and the ubergeek at the same time.

Hiding complexity from the user might be one option, but there should be more ways to make use of the gui concept than just oversimplyfing things.