This statement was made by Ubisoft's director of subscriptions, Phillipe Tremblay, who recently spoke to Gamesindustry.biz about the digital future and Ubisoft Plus specifically. Tremblay states that people eventually "got comfortable" with not owning their CD or DVD collections, and that a similar shift in attitude "needs to happen" in gamers.
Convenience. I've been in situations where it seemed easier at the time to just buy a movie on Amazon. For example, if I'm on vacation or a work trip and I really want to see something.
But that was before I learned about which sites were safe to use for streaming and had high quality content.
Also, I've learned that my library still has a large DVD collection, so I apprise myself of that.
That makes sense. Carrying a library is a whole different thing from having access to a library...