RT was one of the shining examples of ARMH superiority. They were supposed to blow into Microsoft and break up the Wintel monopoly and the next stop was servers. Now it's abundantly clear that RT was a mistake, stand alone low power processors mean nothing and like predicted brought nothing new to Microsoft. Microsoft just wanted it's opportunity to fail with ARM, and it has.
Microsoft won't kill RT. Windows RT version 8.1 is due out later this year. Just the same they can't fix RT, they tried hard to find a market for it. It was hard to entice developers to write programs for it, which is now a universal problem. The more expensive Surface Pro is now outselling RT devices. Just wait until 14nm low power, lost costs processor hit the market. It will be a viable, affordable third platform. You will see that it will be Android and iOS for consumers, and Microsoft for enterprise. There has been little talk that I've seen about Intel powered Microsoft Windows Phones. This may be the enterprise solution for phones that corporations have been waiting for. And it may be the final death nail for Blackberry.
Windows RT, a nearly 1 billion dollar mistake, and counting.