Windows Blue has leaked online, and has provided brave downloaders with new details about Microsoft's upcoming OS update. We now know that Microsoft is building new apps for Windows Blue and that the update includes new Start screen improvements and that Microsoft is introducing tab syncing into IE11.
WinBeta got some hands-on time with Windows Blue and are currently finding out some very interesting things. With Blue, Microsoft has expanded the capabilities of Windows 8 across multiple screens. Windows Blue allows users to have two or more applications open on two or more screens along with the desktop, meaning you can have multiple Metro applications, like Mail open alongside "People," open side-by-side, as well as the desktop. While the current implementation is buggy, Microsoft is obviously working on including better multi-monitor support in Windows Blue.
Helpfully, WinBeta have produced a video showing the new additions: