Several years ago I subscribed to a mailing list that was going to create a ROX-linux. What happened was major discussions on how to change ROX filer, I don't know if anything ever got released. I think Simon's approach is far better. I think the only dissapointment would be if there's no compatibility with ROX applications (or at least a simple port being possible.)
I think this will be of interest to all RISC OS users who have a PC and those who want a laptop.