From Nokia: http://conversations.nokia.com/2014/01/09/lumia-black-update/
The one thing that I thought was “cute” was the App Folder idea. If you recall clustering apps into folders/groups has been around since almost the beginning of guis (eg you could group programs in Windows 3.11). Which is why Apple was ridiculed when it claims that introducing folders was innovative.
I’m not saying App Folderis at all innovative but it can be a useful feature to the platform. Unfortunately it does require apis that aren’t available to third party developers to build this functionality which is why it had to wait for Microsoft or Nokia to build it. I do live the fact that it doesn’t require an OS refresh in order to get this app. I also like the fact that the images on the folder tile are big enough to see what’s actually in there, particularly with the wide tile. Here’s mine for games…..