Two thoughts I have had on this:
1. I wonder if clients will go back to driving in our cars. Over the years, this has become less the 'norm' than it used to be (at least in my market).
2. Around here, we are already seeing buyers refuse to look at homes with oil heat. They will only look at natural gas (not propane!!). I think that is going to get even more prevalent and it will 'hurt' the resale of homes currently running with oil.