One major advantage over 7 (although 8.1 had it - but who wanted 8.1)
Multiple magnification settings
Win7 allowed ONE windows magnification setting for all screens (100%, 125%, 150%). Win10 allows you to set it per screen. Useful if you have one High DPI screen (my laptop) and one standard DPI - the second monitor in my case.
Other than that? No huge difference. Some things are faster (just as they were in 8.x). The first machine I upgraded was on 8.x, and couldn't wait to get rid of that pig. Then I upgraded the laptop that has the high DPI screen, but right now, my main boxes are still on Win7...