It would take more time than the question really deserves to respond comprehensively. Especially if Apple keeps putting out new products like they have been over the last year. Although it's almost exactly the same surface area, the display is slightly larger than its older cousin. There's less frame around it. There's not much it can't do.
Some people decry the omission of the floppy drive.
Or through file-sharing over ethernet. Or by Zip disk. This was a big omission on the iMac, but I'm glad they haven't removed it from Powerbooks. Otherwise I'd have a very useless scanner. Unlike my older machines, it doesn't crash but once every few days, and only when I am really taxing the memory and the processor.