New to Windows Server 2012 R2 since the release (without Desktop Experience installed):
- Shutdown button on Startscreen for non-touch screens with the option to shutdown or restart.
- Search button on Startscreen opens up the Search charm.
- Instead of a Modern Option bar at the bottom when your right click an App, it now shows you a context menu.
If you also have Desktop Experience installed it also adds:
- Ability to pin Modern Apps to the taskbar (Store is pinned after update).
The installation consists of 2 .MSU files, you can install both in this order and then reboot.
There are more images available in the gallery.