Actually good multi-monitor support. (UltraMon has become redundant).
Storage Spaces, a sort of ZFS-lite, depending on your usage it might be really handy, or of no use. (it was introduced in Win *, but it's better in 10)
Secure Boot. With the very large proviso that it disables dual-booting, this makes your system much more secure.
Better file copy dialogs. With graphs and everything!
Stuff that I don't care about or use:
Cortana: disabled, I have a browser if I want to search the internet
Windows store: ignored
Multiple destops, meh, I have two monitors, that's enough
There will be a bit of a learning curve to find the new places where MS have hidden things. You now get a settings application, which is sometimes separate, and sometimes duplicates the Control Panel. Also, various UI bits have moved, but if you're used to switching between different OSs regularly then you'll work it out in a week or so.