The hardware upgrade doesn't look that impressive - I'm happy with the current papewhite. The pageflip UI looks like it could be useful, as that's one of the few UI complaints I have with the kindle.

Personally I find the FreeTime feature to be the most interesting, or maybe amusing. They're gamifying reading, but I suppose parents were doing that already (read X books, get Y).

Now if only they'd fix hyphenation and justification, or make it easy to enable ragged right text I'd be happy. Currently I have to reformat everything in calibre before I read it.