Those who think e will not eventualy move be it in 50 years plus towards alternatives to petro are ina bout the same place as those who didn't beleive that radio or TV was possible, that travel to the moon wasn't possible etc,.
I already have a friend who entirely powers his car from bio diesel fuel in Vermont. Just drove the car down to NC and back without a hitch. Bascially gets the old cooikng grease from MdDonalds and Wendy's. No sulfates come out and the wxhaust snmells just a little like popcorn.
With BP's commitment to alternative energy I wouldn't be surprised to see them take leaderhip there just as they already have in the world of solar energy.