So what you are talking about is, not a game w/ rounds and matches but an on going world. Anyhow, I can see it happening if there was only like 1 or 2 servers so the amount of people at any given moment would be larg, but your right about us needing alot of people wanting this to happen.
But the truth is, alot of people do want this to happen.
All this talk about an RPG mod from alot of players. When blue is released, every player/ modder that wants this to happen need to put heads together. Im no modder, so what Im saying is, someone needs to step forward and start a grp devoted to an RPG mod being released using the blue core. I really would like to see this happen myself.
Edit: what if like planetshift (or what ever that game was called) you had to earn licenses to drive/fly different vehicles would be neat. Anyway..