it's only pie in the sky if people (*cough* oil companies *cough*) keep saying it's pie in the sky.
Yea, no oil company would like to be the creator of a type of energy that would get people off of oil and basically have people beating down their door for it.
Have you EVER considered that their is not a good alternative out there right now, because there isn't one? With all these scientists and engineers(obviously the ones not employed by Big Oil) working on this issue and nothing has evolved yet. Do you think there might be a reason for that? It will come in due time, it can't arrive just because we really really really want it to.