Windows Phone 8.1 may be only just out the door, but Microsoft is already looking ahead and is talking up Windows Phone 8.1 GDR1, the first major update to the latest version of its mobile OS.
Newly released developer documents reveal some of the hardware and software tweaks Microsoft has in store, including support for newly fashionable 'smart cases' and wider display resolution support that should see more big-screen phablets emerge on the platform.
That's on top of folder support, which was revealed a while bag, and the usual laundry list of minor tweaks and adjustments.
The ability to work with smart cases will enable phone makers to offer next-generation interactive covers with their Windows Phone handsets, such as the HTC Dot View or LG QuickCircle covers that have appeared with the respective HTC One (M8) and LG G3 Android flagships.
Phone manufacturers will be able to create apps to run specifically when the cover is closed, and control what happens when the cover is then opened.
On the display resolution front, the 1280 x 800 WXGA resolution is now supported, which caters for a standard 1280 x 768 display with software navigations keys below.
And speaking of 1280 x 768, Microsoft is also expanding the maximum screen size supported under the resolution from 6in to 7in – a reflection of the ever-expanding screens that seem more and more to be the norm.
Other additions include the aforementioned folder support, VoLTE support, support for medium-sized Store live tiles, improved Bluetooth audio quality and the ability to create custom lock screens.
With developer docs now out in the wild, the consensus appears to be that Windows Phone 8.1 GDR1 itself probably isn't a long way away now, but an actual date for its release is still very much up in the air.