Gotta list the cons of an all digital library if we're talking about all of this.
1. You're probably gonna need a stable connection to play your games, at least with xbox games on demand you cant play them offline. Sony probably will address that, but until then...
2. Sony introduced 900 new ways to get hacked yesterday.
3. Can't resell games (never liked it but a lot of people seem to do it).
4. Games will probably be restricted to one console
5. Memory issues, with DLC, add ons, movies, tv shows, music and to top it all off complete games on your drive? That's kind of a lot.
With all that in mind i still think it's inevitable, we're moving towards and all digitized media age. And i personally wouldn't shed a tear for Gamestop, they nag their employees to nag the clients, horrible resale value and bs pre order offers.