Well, one obvious global implication is that as N. Sea, Norwegian, Mexican and US production declines that we will be more dependent on OPEC oil. The percentage of oil will increasingly come from nasty hard to get to places with unstable political and operating environments, which increases the chance of or uncertainty surrounding supply disruptions.
Perhaps one of the reasons that the Athabasca tar sands in good ol' Canada are looking more attractive despite what Jim Kunstler says?
At current rates of extraction there are going to be fewer exporters in less than 15-years, which is going to increase the pricing power of those who are left.
The organized state is a wonderful invention whereby everyone can live at someone else's expense.