Re: All the more reason...
I've been playing WoW on Linux (Fedora core 6 what what I started with) for years.
I currently play Diablo 3 on Linux.
It's not hard to play Blizzard games on Linux, yes you need Wine, but it's pretty trivial to do it, especially with things like Play on Linux. They even do a Mac port of all their games so you get OpenGL mode as well as DirectX.
Complaining about not being able to leave Windows because of Blizzard games is silly.
I've assumed you mean Blizzard games as opposed to Activision games because you explicitly said Activision-Blizzard, as opposed to just Activision.
Amsusingly I can't play Diablo 3 on my Windows 10 test machine because the Nvidia Optimus drivers are borked on Windows 10. Other than that it's a nice little system. I was well aware of the tracking, it's a test release after all, it's expected.