here is what Gamestop has to say about it:

"“Both Sony and Microsoft have said games can be resold and that’s exactly what we anticipated,” said Bartel, who added that GameStop puts $1 billion in trade into the market and 70% of that money goes back into new game sales. “It’s a recognized way to make these games more affordable. All three new platforms understand that.”"

"Bartel was able to watch a livestream of the Xbox Reveal. He loves the power of the Xbox One and how Microsoft is enhancing the entertainment system, but making the console gaming-centric. He believes the simplicity of the Xbox One, which offers Instant Switching between gaming and other entertainment and Web surfing, will be a key selling point for next gen consoles this fall."

http://www.forbes.com/sites/johngaudiosi/2013/05/21/gamestop-president-tony-bartel-talks-xbox-one-playstation-4-used-games-and-pre-orders/

Seems like he is fine with news. With out knowing how they will do the used games, rentals, or sharing of games its hard to say how things will go down. But MS has a good partnership with redbox (redbox on demand is a partnership between MS, Verizon, and Redbox), MS has also always been in good standing with Gamestop. I doubt they would burn their relationships by making used games not an option. I hope they do things right. I will wait for final judgment until we know how they will do everything.

They have stated how it will work but when they started back peddling they changed their wording a bit.  They just havent stated specifically how much you will pay and how many payments might be demanded. If you watched the video I showed Adam Sessler got a one on one with Matt Booty. They are playing with words, but if you listen to them all at once, essentially once you buy a game Xbox Live authenticates it and locks it to your account and goes through a manditory screening process for the game after a manditory install. If it just so happens that you bought the game used another pay wall comes up before you can play the game. This is done in somehow in connection with the fact that the Xbox has to be online once every 24 hours. 

We dont know what the activatoin price will be. we really do not know enough right now. Its specultion by forum goers. Nothing concerning used games has been confirmed or anounced except that it will play used games.

Because they only care about, that a gamer can sell his game to them, and then they can sell it to another.    The big problem they are not seeing or do not comprehend, is that yeah the disk can be sold, but it is a worthless piece of plastic if it is arelady registered with someone's account.     When the mainstream "naive" costumer realizes this, they wont buy used XBOne games (nor xBone consoles), and so Gamestop will be screwed.

i dont think it is mostly speculation... i think it is logical.....

they would not charge cheap on activation fee.... since they are trying to increase the "profit" by cutting one of the head of the "used game" business.  and if you are right, that it install the whole game in your system, then that would kill their digital sales if they charge cheap activation.... hence the premise that it would not be cheap......

Phill, Nelson, and Matt are saying the same thing.  the game is attached to your ID, so if someone else wants to play that game in his/her account they will need to buy the game again.  So basically the one who buys a used game disk, is an idiot, because he will also need to pay full price of the game through the XBL.

its also logical that they wouldn't want to kill off a part of their customer base that buys used games (or the biggest game retailer in the best market, gamestop). So until they anounce it, its just us forum goers each using our own logic. which is usually each poerson seeing what they want. so again its best to wait for atual facts and info.

The steps MS and EA have taken....are essentially to kill off the used game base whether Gamestop foresees it or not. If your use of your game is stuck to your one account they are shackling you down to an iron clad license. There is no longer any ownership without used games or the ability to have to freedom to lend out your games to friends. As booty said...if you your friend wants to use your game they must use your account or incur the paywall.

I agree with the letting the friends borrow games. that is stupid and anti gamer. on the used games though, they have clearly stated that they have a method for trading and selling used games, they just have not anounced how it will work, or the fees involved. The steps Valve has taken have killed off used gaming too, but with it they brought cheap games, so it worked for consumers. This may work too. I will reserve my judgment until I know more. I personaly dont buy used games, but I want my sytem to support it as I know it's needed to keep others gaming and too keep more money in the gaming economy.  I game almost exclusivly on steam, and now with amazon on demand pc games, so for me the xbone is going to be perfect, if it has cheap games like amazon and steam. if not I may not get it.

In Valves case PC gamers had been forced into digital distribution with licensed games a long time ago. Valve just made it worth their while for lack of ownership. Consoles are the last place of true game ownership. I feel bad everyday I see a PC gamer walk into Best Buy or Gamestop and ask for the game. The physical selection is extremely slim and its only really the major titles that have that type of support.