I keep hearing rumblings about the no Used Games thing and I can honestly see them going there, but it would fail miserably... like you guys already mentioned, Gamestop would go out of business (I personally hate that store, but it would hurt the economy), plus Redbox would be hurt by the no-rental thing.
Constant Internet connection bothers me too, as I have spotty service from time to time (Suddenlink - Making sure Buffering is still a thing in the year 2013!) and I have to reset the router and junk. Could get messy.