Sorry but the features you describe are not going to make the slightest difference. Do you really thnk that developers are going to come flooding back to the platform because there is a machine fitted with UMA graphics?
What is required is for RISC OS to find it's way onto newer kinds of product, where the markets are new, and sufficiently dynamic to support niche players - PDAs would be an ideal starting place - all of the WIN CE based machines are ARM based designs. We need a version of RISC OS that can be ported easily (well fairly easily) to these machines - such initiatives are the only way forward, IMHO, if we are to ensure the survival of our favourite GUI. Oh, and who has such a version of RISC OS? That's right t's Castle.