Yeah, I'm disappointed that sometime in the '90s (or maybe even '80s) we settled on what a "desktop operating system" should look like and we've done nothing new since then. We also solidified on what a "mobile operating system" should look like and that is beginning to stagnate now.
Maybe we'll get some new ideas with AR operating systems, but I have a suspicion the designers will mostly just try and port desktop and/or mobile interfaces to AR. We'll have virtual desktops, windows, and app icons floating in front of our faces.