Please read: Xbox One "always online" confusion
I've noticed some questions and comments in the following articles regarding always online and Microsoft's statement:
Microsoft's official statement on the matter is the following:
No, it does not have to be always connected, but Xbox One does require a connection to the Internet. We’re designing Xbox One to be your all-in-one entertainment system that is connected to the cloud and always ready. We are also designing it so you can play games and watch Blu-ray movies and live TV if you lose your connection.
Microsoft has confused matters by mentioning a 24-hour connect "scenario," as outlined in our original story, but the official comment still stands. The Xbox One requires a connection to the internet, but it doesn't always have to be connected. Specifically, it can cope in the event that a console's internet connection is interrupted. A lot of people have taken this to assume single-player games will be unaffected by the "Xbox One does require a connection to the Internet" part. It's unclear at this stage exactly how single-player games will be affected, how they cope after a connection interruption, and whether or not they're supported if the console is fully offline for long periods of time.
Others have misreported that Microsoft has "confirmed that single-player games don't have to be online to work," but this is simply based on Microsoft's vague statement. Publishers have the opportunity to leverage cloud processing in single and multiplayer games. They also have the ability to use the new Kinect sensor that ships with the console, and it's likely that this itself will require some processing in the cloud for commands too.
Remember, these requirements are partly designed for publishers and DRM. It's almost guaranteed that Sony will have similar requirements with its PlayStation 4, otherwise games publishers will see an opportunity to generate more revenue with the Xbox One and there will be no console war. Fortunately for Sony, it hasn't been the subject of rumors and speculation leading up to its announcement, and nor has it been in the spotlight over this matter. What I'm trying to say here is don't look at the situation as a single-player vs. multiplayer scenario in terms of the online requirement.
Direct your questions and clarifications towards Microsoft, who need to provide more information here. We, nor I, have no bias against the Xbox One or anything else Microsoft-related. We're here to do accurate reporting, and with Microsoft refusing to answer questions we're left to refer to an original statement that's vague and confusing. Don't shoot the messenger for a confusing situation.