Too many factors to figure in...but if fuel prices go up..passenger flights get hit first....cargo...the life blood of most business, will simply pass on the cost to the consumers...
When people talk doom and gloom, with some forcast of everyone living under bridges, fighting over cans of chili with the bums, ..it's just sensationalism..
Even a meteorite hitting the earth wiping out 80% of the worlds population doesn't mean everyone will give up gasoline, PCs, autos...
Always found it funny in movies portraying a post apocolyptic earth...everyone dresses up line punk rockers....