IMO what is more likely to happen is that past collectors like my self will be more apt to start reading digital editions so we don't have 20 long boxes of comics that I wives nag us to get rid of. I quit collecting about 8 years ago mainly for a space reason. Probably pick up new readers that don't want the perceived stigma of being seeing going into the comic shop or are just scared to as some shops draw a "strange" crowd. There is a reason most shops have separate rooms for gaming (not trying to be insulting I used to be one of them)
At least for now I don't see the mass exodus of traditional readers to digital for many different reasons but mainly going to the shop to pick up your weekly stash was always a little exciting, maybe you see some new title and snag the last #1 alternate cover, ect. Also most store handle gaming, swag & other related items, maybe an artist signing ect.