I have a Surface RT and I love it! I use it for nearly everything. I use remote desktop or team viewer for anything that requires x86 apps.
Its brilliant to use around the house! my wife has her Nexus 7 and has to switch between that and her laptop every so often while I just use the Surface.
When my laptop dies which wont be long (though it could be longer as I don't use it now) then I plan on getting a Surface Pro. The build quality of it (Surface RT) is outstanding. I had an issue with the touch cover, contacted Surface support and they were amazing, got a new touch cover no questions asked and in quick time, reported the issue at around 1400 and got the new one at around 1300 the following day! I cant recommend it enough. Everyone I show it is impressed with near enough everything it can do, the only downside is that not all the apps I used to use on Android are available, but Android is coming up to its 5th Birthday in October and that will be 1 year of Win RT.
25'879 are in the Windows Store as of writing and if, this is a big if, Microsoft can some how link the WP store and the WinRT store then it has massive potential.
I only wish that Microsoft really pushed hard on getting these into people hands. In the UK John Lewis is a very repeatable store but that is the only brick and mortar place you can get one. In nearly every store I go these day there is a gadget area selling iPads and Androids, come on Microsoft lets have you back at the top of the tech tree, where you were when you bailed out Apple!