I've never understood appeal of CarPlay. I have it but prefer factory nav sys & Sirius XM radio. CarPlay is just a 2nd screen for iPhone.
"CarPlay is just a 2nd screen for iPhone" In one sense, you're right. But what's wrong with that? I have my phone with me 24/7. I use my car less than one hour out of that day. Why should I pay for additional media subscriptions, cellular data service, etc. for the sake of that one hour? Why should I have to buy an optional Nav system that costs more than the phone I already own? Why should I have to port my contacts list/address book from my phone to the car? Will the car system have access to my phone's calendar to know I have an appointment in 30 minutes and then automatically offer turn-by-turn instructions to that destination?
The time I spend in the car is a small part of my day. I'd rather have the system that's with me 24/7 integrate seamlessly with my car than have an independent/redundant system in the car that integrates poorly with the rest of my life and requires an additional learning curve.
Now, would I buy a car solely because it has CarPlay? No. However, it's more than enough to tip the balance in a buying decision.
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Back to car keys... which has been one of those obvious applications for NFC for years now (what's taken them so long?) Some of the "key" benefits to me are:
Easier (and cheaper) replacement of lost/worn-out fobs.
Less likelihood of having a fob with a dead battery (more likely your phone will be charged).
Multiple keys in case one is lost (watch, phone, fob).
I'd probably still carry the fob, as it may be necessary occasionally for valet parking, automotive service/repair, etc. That means I have a backup to the fob if it's misplaced (very small probability of it happening, but it's always on my mind when I hand the fob to a stranger).