Biggest hope: world domination. Bitcoin should be able to be spent all around the world at most places that accept creditcards etc. Not sure if it will happen but that's my biggest hope for it.
It is possible only if bitcoins goes on mainstream and have higher adoption level, my hope from bitcoins is that it should replace the major currency like USD and become a primary currency which should be used and accepted world wide even for buying vegetable or for grocery stuffs, if this happens than we can say that bitcoins has become a primary currency.