Perhaps in another generation or two. Killing physical media would basically help eliminate much of the casual market. Many are not willing to wait 2+ hours to download their 17GB+ title. Not to mention data caps that many ISP's are possibly planning for consumers.
Backwards compatibility was pretty much doomed since, both MS and Sony allowed such options to be absent from later revisions of their current consoles. However, the "tagging" for games to prevent them from being used on another console; is basically smoke. The PS4 is already slated to be able...