It looks like it should just be called Windows 8.2, since it's pretty much Windows 8.1 with some of the things that should have been there from the start. I usually try out new operating systems before official release, but I'm not even bothering with this one.
Microsoft has forever tainted the number 8 so bad that other companies are avoiding it.
AMD and Nvidia both skipped an '8' series with their video cards.
My guess is that both companies were like 'please do not ruin the number 9 as well' so MS went with Windows 10. Which I guess also brings some parity with Apple (OS X). I anxiously await Windows Z.
So, by my measure, Chrome is winning the version wars, now at version 37. That's more than 3 times as good as IE 11.
I'm just rambling about marketing nonsense. I'm sure the OS is an improvement. But this is getting to be like the opposite of the original Star Trek movies, where only the even-numbered movies were any good.