It was pretty much a given that this would happen, since there were already options with and without disc drives.
And obviously sooner or later gaming will probably move to an entirely online service like streaming.
It's just a matter of time until the internet and worldwide coverage is ready for it. I always imagined that in a distant future we'd basically only buy a controller, that connects to an app that'll let you stream. And every game will be in a subscription service like a Netflix.