As per the title of my post I'm somewhat confused over this whole thing.
I'm a recent convert to Ubuntu (in fact to Linux of whatever flavour although I did have the job of supporting a Ti System V based two site network back in the early 90's which means I have at least a vague idea of Unix based OS) due to the fact that my current laptop (a Dell M6500 Precision) won't run Windows of any number when plugged into the charger (works just fine under battery but as I use it for music production that does leave one a tad restricted in terms of battery life.)
I installed Ubuntu Studio about a year ago as it was recommended and (other than the ongoing nightmare of getting my Focusrite Scarlett 18i8 interface to talk to my DAW using Jack and/or Alsa:
Windows method = install driver and mixer software = operational system in 3 minutes
Linux Method = Actually I'm really not at all sure as I got it all talking to each other a couple of times but mostly reverting to legacy analogue gear out of frustration)
It works fine and does everything else I need from a laptop.
Anyway, that's an aside (and a whole different bag of worms)
My questions is - I've just upgraded to the latest version of Ubuntu Studio which I understand is built using the latest 17.04 Zesty Zapus build and hence no longer has Unity. Why does it still look and function exactly the same as before? I assumed that it would be similar to going from say Win 7 to Win 10 in that everything under the skin worked pretty much the same way but the look and feel would be different.