I think it will easily surpass $5.00 a gallon during the summer in most parts of the country. The truth is, while people will complain and threaten to postpone trips, weekend activities, etc, most will forge ahead with their plans.
And for the people who bought big trucks and SUVs in the past three years, I don't want to hear any of them complaining. Gas hit over $4.00 back in 2008. That should have been enough warning that the trend was going to be higher prices going forward and gone were the days of sub-$2.00 gas. If you still went ahead with buying a gas guzzler, you have no one to blame but yourself when it costs $100 to fill your tank each week.
Electric cars may seem attractive, but I wonder if you really save anything, since you have to buy batteries frequently, and also you are limited to how far you can drive and where, since they have to be recharged all the time. I think hydrogen fuel cells and other technologies would be more practical.
You shouldn't have to replace batteries in electric cars often. The Nissan Leaf and Chevy Volt both have 8 year or 100,000 mile warranties for the batteries. Since I believe many Americans keep cars for about 10 years, this seems like a completely acceptable warranty to me. Also, battery technology is only going to get better. Ford Escape Hybrids used for taxi service have had over 300,000 miles put on many of them with no problems with batteries reported.
I do agree that the infrastructure has a LONG way to go for the majority to adopt pure electric cars. But, for two car households, electric cars can be practical now for use in daily commutes, errands, etc. The Ford Focus Electric, coming out later this year, has a range of 100 miles on a full charge and can go as fast as 84mph, more than enough for regular every day use, as most Americans don't drive 100 or more miles a day for work/errands. Plus, at a rate of $0.10 per kWh, it is supposed to only cost $2.00-3.00 to fully recharge it with a drained battey. If you do the math and have a car right now which averages 25 mpg, and you're paying $4.00 a gallon gas, it's costing you $16.00 to drive 100 miles. So, if you drive 1000 miles a month, $30.00 compared to $160.00 is a big savings.
As far as Hydrogen Fuel Cells, while I hope I'm wrong, I think we're a good 20 years or so away from seeing these types of vehicles mass produced. I think you're going to see more hybrids, plug-in hybrids, electric, and even natural gas before I think you see hydrogen fuel cell vehicles.