You can already use your smartphone as a car key if you own the right vehicle (just ask Tesla Model 3 owners). There hasn't really been a common standard for it, though, and that has hurt adoption -- you can't guarantee that you'll have phone access...
‘Digital Key’ standard uses your phone to unlock your car
You can already use your smartphone as a car key if you own the right vehicle (just ask Tesla Model 3 owners). There hasn't really been a common standard for it, though, and that has hurt adoption -- you can't guarantee that you'll have phone access...