Marketing RiscOS in its present state would do more harm than good. Imagine it was "featured" somewhere and an in depth review took place.
Step 1 internet access....hmmmm. It would fail miserably. Simple stuff that everybody does, for example something I did last night was to look for a hotel in Glasgow. Try it ! Almost every site became a garbled mess whatever RiscOS browser you use.
Step 2 multimedia. You can play CD's and.....and.....and....failed.
Step 3 burn a CD. Possible but intuative, no way.
Remember all of the above has become "standard" in computers in the last 10 years and RiscOS world has done nothing about it. If you are going to market RiscOS you had better make sure you market it as an enthusiasts machine. If you market it the same way as pc's and apple's are marketed you will kill off any chance of anybody wanting to switch. Basic 2006 computer features need fixing first.
Oh and I find it very telling that folks would even consider 800x600 resolution some kind of base/standard these days. Even 1280 x 1024 is becoming "low res" on the ever cheaper larger LCD screens.