So my '99 Espace could still be around in 2099, but I'm not convinced thare'll be any petrol to run it on...
Thats very good news, - but as you say, fuel will probably be taxed skyhigh, and gas-guzlers doing less than 60mpg or obtain speeds above 25mph will probably be banned.
The only allowed cars by then will be remotely operated by the state police computer, which connects to the MI5 grid, to fight terrorists engaging manual override.
I recall TopGear some time ago (as Tiff Needell was part of the team) made a fun futuristic nightmare clip, where they met up in some derilickt industial building, having sourced a whole gallon of this "petrol" - so they could fire up some of those exotic cars from the past - until the police arrived and arrested them all - "as they were evidently insane" :-)
But at least we can still LOOK at our cars, which will look as good as ever.
/Lennart