With reference to the above article I think we shouldn't be overly relying on ANY idealistic type of processor to run RO on, even though the ARM chip has wonderful aspects, is currently mostly suited and is adored by us all. In my personal opinion, the jump to VirtualAcorn is a professional and liberating one. Perhaps it can mean the beginning of an x86 based version of RO. In certain ways it is comparable to the recent jump to a 32-bit OS.
As NoMercy points out above, in some ways linux is turning into a free version of Windows - i think there's some truth in that, even though the community could collectively steer away from that any time. If we could offer RO as a similar non-standard, but conforming, means of easy computing, we could really interest a lot of people. I am not talking of making it Open Source though.
"completely impervient to all forms of internet virus, worm or trojan" is a blatant misstatement - we cannot account for that, it is quite possible something slips in via email or the web and sabotages RISC OS through mis-configuring it, for example. And for the non-expert user it could take a while to figure out what went wrong. What we can be proud about, is the fact the ROMs cannot be erased or modified / hacked. (Unfortunately, I don't know about the programmable ROMs on certain machines, but I guess some form of security exists to prevent it being permanently wasted)