I don't think this is the case. Yes, every Xbox One will need that one-time-internet connection with the initial setup, but to install a new game you don't need one as far as I understood. So when you buy it and first start it up, you need internet for that time, but not after that. Thus, when buying a used game disc, you would not be required to be connected to internet with what we know at the moment.
You are right, looks like i didn't really express myself properly, if it were to need at least 1time online authentication they could still have the DRM.
Who buys a console and NEVER has internet? Would a initial authentication like steam hurt anybody? It at least brings back the convience the previous model would have offered.. discless play even with discbased games.