Lots of speculation about this, but lets face it they’re not making a 10 inch tablet. It’s just not practical. At 10 inches it’s not pocketable so it’ll need a cover, and why not put a keyboard on that cover?
My prediction is a 10 inch netbook, possibly with touchscreen. Built in 3g networking too probably. It might even run some sort of handicapped OSX. Lets see how wrong I can be.