Nations that were poorer than us are going to be richer than us soon enough:

Britain’s place among the world’s largest economies will have slipped significantly within two decades as developing nations jump ahead, long-term forecasts have suggested.

Booming populations, huge levels of state investment, growing consumption and increased trade in India, Brazil and South Korea mean that all three will overtake Britain’s economy by 2030, according to the Centre for Economics and Business Research.

We'd argue more than a little about the effect of those huge levels of state investment. Brazil did have some little worries with such into a car wash, didn't it?

The report itself is here.

It isn't, of course, quite what it is being made out to be. They're looking at the aggregate economic output of each country and there's really no reason at all to think that's all that important. How much is going on inside arbitrarily drawn lines on the map isn't important.   

What is important is the GDP per capita, because that's the measure of the consumption opportunities of the populace. And on that measure we'll continue to be at the leading edge of the pack for some time yet.

But then even that's not all that important. Sure, we'd like to be as rich as we can be. But why should or would it worry us if others became as wealthy, or more, than we are?