Neowin picked up more rumors about Windows Blue, an updated version of Windows 8 expected to arrive in Summer 2013 that will reportedly kick off a yearly update cycle for Windows. One of the things that is for certain with Windows Blue is that the Start button will definitely not make a comeback. Other than that, Microsoft will make tweaks to the desktop and taskbar, but it's unknown what those changes will include.
Microsoft will also continue the metrofication of Windows's user interface, all aspects of Aero will be killed of completely, and the entire UI will appear flattened.
This should not come as a surprise as Microsoft would have a massive egg on it's face if it did cave to users requests to return the iconic button. But beyond not brining back the Start button, the source is also saying that Microsoft will continue to make tweaks to the desktop and that there will be updates to the taskbar too. What these tweaks are or will include were not stated. In addition to tweaks, the entire UI will appear flattened (think metro), the kernel will get updated to 6.3 (which we had previously heard) and will be provided free or at a very affordable price.
With flatter look being applied to more parts of the UI, all aspects of Aero will be killed off completely with Windows Blue, according to the source.