You replace your phone or tablet (on average) every couple of years. In two years, it's obsolete. Not fast enough, not enough storage, doesn't run the lastest apps or the latest OS updates.
You replace your car far less often -- and as cars are lasting longer and longer (remember when 100,000 miles was end of life?) one of the ways to get your car to "need replacing" is to build in technology that looks ancient in 2 years. What do you suppose the resale value of a car is that is 3 years old, has less than 40,000 miles on it, but can't run the latest dashboard operating systems or applications?