I think in 50 years, we're talking 2070, an ICE vehicle will be a rarity, an antique, probably mostly banned outside of shows.
Trains will have been electrified, planes I don't know, could be on hydrogen, heavy trucks could be on hydrogen (fuel cells) maybe. I think by then only EVs will be sold as cars and LTs. This would mean the end of the large "oil company", we'd still need oil for chemicals.