I say No for now because because there are still who do not have knowledge about bitcoins or even know it, there are still who contradict to the idea of digital currency.
It's very hard to imagine a scenario where you only want to buy stuff from the vendors along the street and use btc as a payment. I think using btc in that scenario is not very practical.
As long as people can see disadvantages in Bitcoins, it cannot remove the kind of money that we're using over hundreds of years.