Are constantly increasing Gas prices going to make living in the Suburb McMansion an unattractive proposition

GAs prices are going sky high and will probably be at $5 next year. Still in many cities people choose to live in Large homes in the Burbs and commute 50-60 miles round trip everyday. For example a 2 car family will spend $400 a month just commuting 2 cars from a suburb with gas at $4 per gallon and uming thier cars give them 25 mpg.