In a blog post, Major Nelson has some good news. "Should you choose to play your game at your friend's house, there is no fee to play that game while you are signed in to your profile," Nelson wrote. The blog post also mentioned that customers will be able to trade and sell their used games at retail outlets.

However, Microsoft executive Phil Harrison, in an interview with Kotaku, has some potentially bad news. The aforementioned 'fee' to play games on a second account? Full MSRP. So if you want to play your game on another system, you'll be dishing out an extra $40, $50, $60 - unless you're logged into your main account. (Parental controls will allow you to grant access to other accounts on the same hardware.) Harrison did tell Kotaku that his company plans to allow gamers to 'trade' their used games online somehow - though declined to get into further details.