I am the CM and MDM admin at my enterprise and at this point, I am the ONLY advocate of Windows RT compared to iOS and Android.  Same with a EA, we have not had one since 2000 but I am suggesting switching our CM to System Center, start to use Azure, etc that require a EA.  It a lot of money and there are plenty of voices opposing an EA for economic reasons.

I have a TechNet sub and I also have a RT device to test with only because I work for a company that's progressive enough and large enough to value and afford having their analysts do this type of research.  Smaller shops or ones without a budget will simply ignore these new technologies because there are no advocates.  

Treat operations/admins as second class Microsoft at your own peril.