Most cars (in the UK at least) aren't bought any more. People just pay a monthly fee for 3 or 4 years then return the car. I'm sure all these 'optional' extras will be added to bundles as we see already. Winter Pack, Adventure Pack etc etc.
I don't think it will make much difference to the purchase of a NEW car.
Interesting bit will be what happens in the 2nd hand market. All the optional extras generally have a zero price as far as the resell price is concerned. If you buy 2nd hand on a loan of (say) £200 per month, are you really going to be willing to pay half as much again for the extras?