I get the impression that Microsoft don’t like talking about Windows RT but they have said that the ARM powered Surface devices will get some kind of update and in the past they said it would be around Windows 10 RTM date. Today Gabe Aul on Twitter has put a date to the update of September and it seems it has an official name of Windows 8.1 RT Update 3. So we know the name and the date what we don’t know is what the update will contain.
It could just be minor tweaks to some of the apps like Groove Music but it could also include Microsoft’s new Edge browser. Microsoft could even go as far as giving us the new start menu, but I doubt it. Hopefully we will get some details before September.
@jon5798 Windows 8.1 RT Update 3 will be available in September
— Gabriel Aul (@GabeAul) July 15, 2015