From my own personal experience, I don't think it's a case of what features Oregano 3 might be able to bring to RISC OS if the release slips to the end of the year - I think it's a case of, can the Firefox port stabilise in time for the Oregano 3 release? When Oregano 3 comes out, and if it's stable, isn't the disaster that Oregano 2 was, has Flash and so on, and Firefox is crashing when you use it for more than 10 minutes and has all the redraw glitches it has now, then people are going to vote with their feet.
I think each web browser is vital, because it will keep the others on their toes and mean we actually get a decent web browser for our money. I know progress is being made in all corners and November or December is a long time away. Just my personal opinion right now.