The King for How Long?

OK, though I am a bicycle/pedestrian advocate I try not to get too self-righteous because I still do drive a small pickup truck (infrequently...less frequently at times than others), but I couldn't help myself here. I was pedaling back to work to finish the second half of a split-shift when I came upon the above truck getting ready to fuel up the local gas/petrol station. I think the thing that bothered me was that it was called "King" oil. Anyhow, I saw the driver getting out of the truck and I coasted up to him and asked if I could take a few photos of my bike in front of his truck. He seemed a little surprised and responded, "I don't give a rat's ass what you do in front of my truck." OK, Mr. Happy, I thought to myself, and took a few shots; that's one of them above. Gas powered vehicles have been popular for what...something like the last 100 years, if that? Just a mere blip on our civilization's radar. Bikes predate the car and will likely outlast them (at least the gas-powered ones). So I ask you this rhetorical question...how long until the king oil is dethroned, and who is his predecessor, but more importantly...his successor?