What was the bet? :)
Funny thing is, I've just always referred to it as "ArcGIS Desktop", never even noticed the "for". "ArcGIS Enterprise" on the other hand? ....total surprise.
You can access and read the 10.5 help documentation online:
Hope this helps,
I still think there is time for one final name change. My vote is for "ArcIMS Pro"!
At the same time, I appreciate all the links Derek Law and Jayanta Poddar as the documentation helps describe the licence changes (and made into a post). ArcGIS Server 10.5 is now ArcGIS Enterprise 10.5 - Spatial Times