Although neither Windows 8 Pro nor Windows RT is commercially available, Microsoft has published a fair amount of information about the operating systems. Last week Microsoft's Mike Angiulo, vice president of the ecosystem and planning team, published a long blog about Windows RT. So far Asus, Dell, Lenovo, Samsung, and, of course, Microsoft will produce Windows RT tablets. Microsoft determines which manufacturers may license the operating systems.
Don't Write Off Windows RT Tablets for Business