in my opinion 50cal is similar to a hell of a lot of other landmarks in paintball, for instance the introduction of.. air as someone already said, xball, electric guns.. people are resistant to change, .68 wont die as long as those people want to shoot it, however a lot of us revolve on the PSP and the millenium, if they switch then a lot of us will too.
if our sport is to progress, and be recignised as a sport we need to support that as much as possible.
as for what you said headshot, i think many people will agree with me that paintball is in a huge slump, and therefore in many ways "broke"