Hopefully not in my lifetime; and the way I'm ranting at the moment that might only be a few weeks! The most promising 'alternative fuel' system I've seen to date was the hydrogen cell that could be utilised across car, motorbike and domestic uses. Started off quite promisingly but probably wouldn't make enough money for the oil companies being so abundant so, if you'll pardon the pun, has been put on the back burner.
Boyd