At this rate I can see the concept of buying individual games completely dying, with the only way to access new titles to be subscribing to the correct service.
I can't support these services as I switch around my games a lot, which would mean multiple subscriptions, which would wind up more expensive than my current strategy of buying what I want to play at a price I'm willing to pay.
It's the same reason I dislike movie/TV streaming. It's now so disjointed that if I were to go for that route I'd be swapping my subscription every month to watch what I wanted, or paying through the nose for various subscriptions to access everything I want.