That's exactly what has happened with many other friction-prone car parts. I am old enough to remember when a 3000 (sic) mile service involved greasing suspension joints, universal couplings etc. And aren't some gearboxes now sealed for life? Of course, the combustion process and its byproducts make the engine a special case but there's no doubt the way things are heading on service intervals in general.
It's entirely feasible that,one day,oil and car technology could become so good that engines are effectively 'sealed' and the stuff will never need changing