At this point pretty much everything about Sony's next flagship phone has been spoiled except for the name. The Xperia D6503 "Sirius," which will almost certainly be getting a much less interesting title when it's officially revealed, has had multiple large leaks. A new 12-minute video shows off pretty much everything about the included software.
Note to cell phone leakers: please try and get decent video before you send your information out into the world. A YouTube video spotted by XperiaBlog does indeed seem to be Sony's latest phone, or at least a phone that looks a lot like their previous hardware and seems to be sporting a new version of the company's Android UI. Unfortunately there's little to be seen of the hardware itself.
What we can see is a short tour of some of the new interface functions on what is purported to be the D6503 "Sirius," expected to succeed the Xperia Z1 whenever it's announced.