I think it will become the new standard within the next 5 years. I already see a lot of digital goods venders accepting it nowadays.
I also see many goods venders accepting BTC, Corealz. But I think 5 years is a little optimistic, I'm not sure the world is ready for BTC.
I'd say that if bitcoins keep going it is likely to get to our desired level in about 10 years I'd say.