We've heard rumblings of the next generation of consoles requiring a constant Internet connection, and in the case of the PlayStation 4, that rumor has been dispelled. The next Xbox, code-named "Durango," on the other hand, is still a mystery. Sources now claim that the console will require an Internet connection to start games.
"Unless something has changed recently, Durango consumer units must have an active internet connection to be used," a source told Kotaku. "If there isn't a connection, no games or apps can be started. If the connection is interrupted then after a period of time--currently three minutes, if I remember correctly--the game/app is suspended and the network troubleshooter started." One source claimed this was the case as of two weeks ago.
Microsoft itself has been quiet on the next Xbox, so we've only heard anything from leaks. Some developers have said they're unaware of any online requirement, though Microsoft may simply not be telling them of the system-level functionality. Most sources have been uncertain or vague, so this leak is the first we've heard with such specificity. Of course, anything can change between now and the launch of the console, especially since Microsoft hasn't even publicly acknowledged its existence yet.