We're not all that worried about it because we've been through this before during the '70s and early '80s. Fuel prices doubled, then doubled again, then stayed relatively stable for a long time. We learned from it, lived within our means, so we are confident that we can deal with it. Other people will too.
I think that many of the people bidding up the prices on oil futures are going to lose their shirts eventually. Predicting the future is a very risky business to be in. While gasoline usage is not all that "elastic" in the short term people can and will make adjustments to use less of it. They drive less, they end up with smaller/more efficient cars or motorcycles/scooters (I've noticed more of them on the road lately) they move closer to their jobs or get jobs closer to home even if it pays less because the numbers come out better, and so on.
We've already made adjustments. While we will keep our full-size 4WD pickup, it hasn't been driven for almost a week now. We only drive it when we use the truck capabilities, otherwise we drive the 30 mpg car. If prices are similar 15 years from now when we replace the pickup we'll probably get a smaller one, or maybe none at all, since I don't know how much I'll be using a pickup truck when I'm 70+!
And I've pretty much given up on buying a travel trailer, the cost of hauling one around is now more than I'm willing to spend.