Mary Jo Foley had this to say:
Update: When I asked today whether Windows RT had RTM’d, I received a no comment from Microsoft. Also still getting a no comment as to when IE 10 on Windows 7 will be available. It’s IE 10 for Windows 8 that RTM’d today.Remember that Windows RT is the Operating System that will be used by ARM powered Windows 8 devices. One more thing – (a pet peeve for me) – it’s also important to remember that Windows RT will be used on laptops and possibly some PC’s as well. It’s not solely a Tablet Operating System. We’ll bring you news of the Windows RT RTM (yes I know it sounds funny) as soon as we know…]]>
I stand corrected.
TNW is reporting that Windows RT is RTM’ed
http://thenextweb.com/microsoft/2012/08/01/along-with-windows-8-windows-rt-and-windows-server-2012-have-been-released-to-manufacturing/