I think that, going forward, Europe is going to face a lot of issues if it really tries to become more unified like the US is.
We're facing tons of massive problems since we're so large, and intergrated...We're still the largest single economy, and will be for a long time. Claiming the EU is bigger is like taking a real pot shot at America - We are vastly, infinitely, more intergrated than the EU currently is, and will be for some time.
If EU does what we did, it may struggle to continue to surpass the United States in it's economy. However, as it currently stands, it's in good condition, as there's a bit more freedom between the countries.
Back from the dead, I'm afraid.







