The way that search results are displayed has changed a little bit. Not in any meaningful way, but it has changed.
Some Metro applications still require signing in, and it is still not obvious what to do if you get to this point, other than to give in to Microsoft's will to get you to make a M$ account.
Idiot Exploiter is still the default, and it still sucks as much as it did before.
The Microsoft Store has received a makeover, and it now seems to be possible to use it without having a Microsoft account.
PC Settings has also gotten a makeover, by which I mean they added another set of hierarchies, thereby increasing the number of clicks it takes to get to something...again.