They reckon it's supposed to speed up navigation, cut down on the effort of using the controller to move between menus and find things.  I have updated but haven't launched it yet as I use Plex on my LG now.  But keen to take a look and see what's new as I imagine if it goes well they'll roll out the changes to other platforms.

It is faster, but locating the browse option isn't exactly easy for someone who dosent know Plex (ie my folks). Apparently I shouldve been given a "first run" tutorial when it installed, but I wasn't. Just thrown in the deep end.