I agree with that and I think that still could be a possibility. I really don't see why they couldn't do it, the infrastructure is already there. The problem with that article was it was too what if on pricing. I don't believe for a second that the price structure for new or used would have changed at all. Used would have gone up if the publisher got a cut and I just don't see them changing the structure of new games. Now if Microsoft would have come out and said new games would be $39 people wouldn't have gone as bananas as they did. With the structure they set up that should have been how it is because of all the cost savings from the DRM and the used games cut that they get. They really promoted it wrong and that let Sony and Nintendo fuel the fire. You just can't restrict people that way and keep your pricing structure the same as the other guy and expect no backlash.
I did not think it would drop the price either. It did on Steam, but it took years to reach that point. We shall see what the future brings. I hope we will be able to opt in at some point and get back the features that checking in and restricted disk sharing gave us.