nah i'd buy stuff with bitcoins once the price has risen a lot, because otherwise i'd have to transfer bitcoins to the exchange first and i'll hit the $10.000 withdrawal limit if i want to buy a car or something.
If they don't need to convert it then they won't. But something tangible will always be used as money by many, even if virtual currencies take over.
only by old farts really, the current age is used to a virtual life. Pretty much their whole life is virtual. I mean people communicate more to each other on facebook and whatsapp than they do in person. They are glued to their mobile phone which is constantly connected with the internet. Having internet money is only a logical next step.