Looking over the press long term, the other strong possibility I see is an Apple netbook.
The tablet could be something, if not seen this month, as a product later this year in the summer, or as a product to launch in January 2011.
If Apple eventually gets both the tablet and a netbook in 2010 and at the latest in 2011, nobody cares which order they came in a few years from now. Many here could potentially become fans of both.
Great items I saw Apple put out, but with less than stellar reaction, have been the Cube and the Macbook Air. I liked them, but many didn't. Now something like the iPod is a product which I found to be universally loved, not only by Mac users, but by the general public on the whole.
Most iPod users I know use PCs so Apple successfully breached a group of people who thought Apple was too snooty or too expensive. The iPod has become a must for everybody. I hope the tablet, and/or netbook, will be just as popular as the cultural icon the iPod has become.