Much of the time that people are talking about the "look" needing changing, they mean the homescreen(s).
The biggest debate is often over widgets. To me, it's an easy "yes" that widgets should be allowed. After all, if a person has no interest in them, they can just not use them. It's a simple and easy personal choice, no different than deciding if they wish to use folders or not.
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Tablet homescreens present even more opportunities, because of the huge amount of visual/working space constantly available.
Obviously widgets are very useful in this case. Another option or even alternative would be allowing multiple apps to run in their own window.
A very useful option would be different homescreens (and permissions) for different users and/or times of day.
If you haven't seen the Android
Chameleon homesceen Kickstarter project yet, take a look at the video in
Update #5 about how you lay out the screens. (Btw, they use HTML5 for their widgets, with the idea that it'll be easy for people to develop their own.)
I'd love to see something along these lines for the iPad.