My guess is the tablet will run Touch OS 4 and the 4th generation iPone/Touch will inherit most of the new features as well. A multi-tasking UI, Expose, widgets

My guess is the tablet will run Touch OS 4 and the 4th generation iPone/Touch will inherit most of the new features as well. A multi-tasking UI, Expose, widgets. All would be welcome additions to the iPhone. You've already got the concept of a Dock so extending it to be a multi-tasking UI seems obvious. The iPhone would benefit from a user home directory that was accessible between all applications. If we have an E-Reader app for books, magazines, catalogs, etc it seems like they would extend this to the iPhone/Touch as well offering content formatted for the smaller screen seamlessly. The only area of difference I can think of would be the need for a windowing system on a 10" display. It probably wouldn't make sense to limit developers only to full-screen applications with a higher resolution display. This might be a clever way to offer iPhone/Touch application compatibility to the tablet. Instead of restricting access to these apps, or automatically scaling them full-screen, why not just run them in a window?