Here's a new rumor to add to the ever-growing pile of whispers about the next Xbox, which will be announced on May 21. Polygon says their sources tell them that the machine, code-named Durango, will be able to capture and share video; that it will have some form of always-on requirement (that may ring a bell), particularly about the next-gen system's entertainment services; and that it will add some big changes to both achievements and Xbox Live friends.