Well I don't play games online, almost without exception. The only game I've played online in the last 5+ years was Journey, and that was because it simply did it on its own

I'm sure GameStop is gonna be happy about this. Sell new for $60, used game comes in, but will require new owner to pay $10 (or whatever it ends up being), now GameStop can't charge $50-55 used becaus the would inflate the price to over new retail for the customer. So, the pay less for used games, turning off potential sellers (which is where they make their money, as we all know), and end up selling the used games that they take in at lower prices.
Basically, Microsoft wants to sell the games new AND used. Crafty fuckers. The only upshot I can potentially see is that used game prices may end up on the really low side just because of the hassle involved with making them work. On the other hand, people are sorta stupid, and used Xbox1 games might sell for what ends up being new retail prices or more on eBay.
As I've said before regarding this subject, I won't buy anything like this, be it PS4 or Xbox1, until its been hacked so that I do NOT need to register my life away online to play a fucking video game
offline. I sincerely feel that this is a terribly poor (and greedy) business model.