One bloke I know only needed 2cm more than the length of his (small) car and he could park it. He prove it in front of me It was some 15-18 years ago and then he became truck driver and our roads have split.
Modern cars have now all the sensors and software needed for automated parking. Yes, they need some 3-4 extra cm which cybertruck may be saving, but I'd say that this is more a commercial and no longer a game changer.
I don't say that this crab walk may not have certain use cases, but I don't find the feature so much important. Self driving, on the other hand, remains really handy, especially on long trips on the motorway. *That* was a game changer.
And yeah, I'm still waiting for a real breakthrough in the science of batteries... That would be a huge leap forward and the (ultimate) breakthrough.