I would like to see the following:
Return of a 17" iMac. While this might not be popular not everyone wants / needs a huge screen. I would definitely prefer this.
The option to have higher specs on smaller iMac. As I just said not everyone wants a huge iMac but might want the top specs.
As far as an iMac redesign goes I can see the range removing the bottom silver lip and just looking like the cinema display which would be very nice.
Hopefully the Macbook spec will be upped to 4GB and a slightly faster processor and the price lowered. At the moment I am looking for a laptop, and while I really want a macbook / pro, I can get a Dell Studio 15 with 1080p screen, 4GB ram, 320 GB HDD, 2.4 GHz Core 2 Duo, Blu Ray, backlit keyboard etc for £800. And in my opinion Windows 7 is damn good - Enough to make me not want to spend the extra £700 for a lower spec 15" MBP.
Thanks