I was just watching a 'Married... with Children' episode when the Bundy clan had a vacation in the meat department of their local supermarket. I've been fond of that show since the early 90-s and it still cracks me up whenever I watch it.
My guess is, given the economic situation, some families will indeed take a weekend getaway to the local mall or somewhere air conditioned to save on the energy bill. A lot of the people will not take any vacations this year fearing that they would lose their jobs. The Americans already work a lot more than the Europeans but this year they are going to be even more stressed out. I don't think we have a clinical cause of death for karōshi like the japanese do - maybe it's time to introduce it.