I think some people will end up be disappointed. The fact that you are typing on one now means it's a computer or a tablet (probably the first). I will be disappointed if apple comes out with a new mac mini, and no ibook, and if the ibook is not redesigned, or with a core duo. that means, we will see a core duo macbook (ibook), redesigned, with an optional isight, 1 inch thick, 3.5 pounds, 7 hours real world battery life, and everything else i want.
really, its hard to say that no one will be disappointed unless you know what will disappoint everyone. which you don't. i doubt apple will come out with what stated above (but i think something similar), and i bet some people will be disappointed if the ibook doesn't have this or that, or the mini doesnt have high end features, etc. i want a new ibook, but i doubt that it will be my dream computer.