I beg to differ. The store will fragment. All big names will either open stores (Steam, Epic, Microsoft, Amazon, Meta, etc) or potentially just be available via their own web site. The big names will further fragment the experience by offering exclusive distribution to other devs. Think about how the Mac app store is right now. It is all click and traffic driven, y'all act like Apple is the bad guy, wait till you can't get any games from anywhere besides Steam or Epic, you think they aren't profit driven??
Again, wrong and condescending. The savvy can handle a change from iOS one stop shop to the world of PC/Mac but explain to your parents/grandparents or non-techie friends that they can't get updates to their favorite game any longer because the app moved to the Steam store and now they need to download the Steam store app from the Steam web site, create an account, etc, etc.