2 examples:
1. Someone in nigeria wants to buy an upgrade to their wordpress account. No other way to do that than with bitcoin.
2. Someone wants to send value across the world in less than an hour... they use bitcoin to do that.
But your question is erroneous. There is no need for it to function in such an exclusive way at this point in the lifecycle. It's simply the latent functionality which will, if continued on its current course be for superior to the existing system. It's like comparing Usain Bolt as a toddler to and adult Chris Farley in a 100m dash. You know Chris Farley will win in the short term, but in the long term? Nope.
And how will he get those bitcoins in Nigeria?