What precisely is a "thin client solution", and exactly what is the relevance to RISC OS? I think you are barking up the wrong tree. "Products that allow windows [programs] ... to be used on Linux". No, this is not practical for a whole host of reasons, not least that you'd need an x86 emulator.
Jess, please don't do your usual trick of then dismissing these points, and trying some other tack.