Already happening, just look at Steam.
You buy a PC game and have to go online to make it work through DLC, the disc you buy has nothing on it other than the access codes and launch info.
Absolutely worthless once used due to the hassle of getting new pins and getting it to work without sticking the disc in every 5 mins....
I think the console is on its way out anyway with pads and computers getting more powerful and portable and things like games being hidden up in the clouds.
This to me is why they are trying to rinse out the console gamers pockets one more time, as in 5 years games will all be downloads and full of f**king adds and bugs put in by paying sponsers grrrr