Anything good for Desktop users? Seems that all of the improvements (?) are for mobile devices.
The underlying operating system will continue to improve, in performance, security, and stability.
But honestly, I don't foresee much more happening for desktop users, either in Windows or OS-X. The platforms reached a plateau of features and capabilities a couple years ago, and for the most part, users are content. There's only so much stuff you can ladle on before it starts running off the edges and folks don't use it.
Linux has a little more way to go to catch up, but it'll get there too.
So I tend to agree with your observation, and it doesn't surprise me that we've reached that point.
I imagine other folks will point out this or that new feature and call it a Big Deal if they want, no argument needed. But compared to the last 20 or so years of dramatic improvements, the desktop has about reached saturation.