Any idea if they plan on remaking the icons for their apps? (iWork, iLife, iBooks and such).
Likely. Just like they will redo the apps themselves.
I personally hope the toolbar from the beta turns up in the Mac version of iWorks if not the iOS version as well (so long as in that version it slides in and out to give us max screen space to work with). It is a major improvement over the current forms
iBooks is fine in general although I could do with a better sorting system for titles, no more separate purchased list and a few tweaks with notes like not requiring them to be attached to a highlight and even being able to link passages in books if not between them.