Be your own bank
It is actually funny that this slogan is used by one of the biggest online wallet providers Blockchain.info - Be your own bank, so we can store your bitcoins for you.
Bitcoin change the global economy. Bitcoin is remarkable where it allows me to send money to anyone anywhere in the world, it is free without any party.
We don't see any radical changes here. Bitcoin with its market cap of $12 billion is not exactly a major player of global economy, not yet.
Sending money though Bitcoin network is not the best argument - with PayPal you can do the same - unfortunately most people don't care about 3rd party factor if transaction is free.