It's the next step in consolidating your cell phone, portable web browser, mp3 player and laptop. It reconfigures it's appearance and touchscreen for the task you are engaged in, because it has sensors to detect orientation and proximity to the face, and it's made by Apple, so that virtually guarantees a well-researched user interface. It also runs OS-X, so it will probably support a whole raft of third-party apps developed by people on Macs.