Shots have officially been fired. Sony announced that they will support used games on the PS4 with no restrictions or red tape and that there will be no online checking in like on the Xbox One. So to further rub salt in the wounds, Sony released this amazing instructional video about how used games work on PS4.
There was one tidbit that was interesting about the video. Apparently at the bottom is says that online games will require a PS+ subscription. I can't complain too much since PS+ is apparently only $5 a month now.