PC Gaming is a big initial investment for some people so making it more accesible will maybe also attract some of the mobile market who want to play AAA titles but dont want a console or a PC.
That being said I dont think we'll be saying goodbye to the desktop gaming PC anytime soon.
But anyway it's probably minimal the amount of PC gamers that migrated to mobile gaming. And cloud gaming will probably be similar. In fact I think it's doing pretty poorly already in terms of adoption.
Remember I'm not arguing that cloud gaming will never become popular. I'm arguing that we shouldn't worry about gaming becoming cloud only.
... With whales subsiding the industry due to gambling addiction?
I for one expected mobile gaming to revitalize story-driven, turn-based traditional RPGs like 2d Final Fantasy, Chrono Trigger, Earthbound, etc...
Boy was I wrong :|