[citation][nom]frombehind[/nom]I'm sorry, can someone please explain to why ANYONE would want the surface... that (while a bit cheaper) CANNOT run x86 programs, and has no established device-specific app base.[/citation]
First off - even on the ARM-based RT tablets, you get a full Office suite, something that NO ARM-based tablet currently has (you could argue Apple's iLife suite, but unless you're bought into Apple's ecosystem you use Office). The best others can do are imitations that don't have nearly the same feature set, especially if you do things like grad school papers that require mathematical equations.
Secondly - Microsoft is taking an interesting approach with W8. All versions of the OS are running common code, which means apps written for one W8-based device only need tweaks to run on other devices. This is something that Apple hasn't even done - iOS and Mac OS don't share common code (or at least, as much as MSFT is using). RT is an interesting idea because it bridges the full-functionality of W8 Pro and the ease of writing apps for WP8, so I would expect to see some inter-compatibility between apps on your WP8 and RT devices (think iOS on the iPad + iPhone).
Thirdly, and probably most importantly - RT is meant to keep device costs down. Lower device costs = greater sales, regardless of the profit margins. I doubt RT devices will be hot sellers at $500, but I imagine that the Surface will be somewhat higher quality than OEM devices (which will probably cost less, since companies like Asus have gotten great at lowering costs - e.g. Nexus 7).