Applications that open up spare capacity are a big deal. First eBay did it with the spare capacity of stuff in your attic. When counting pro sellers, eBay is the largest employer in the world. Next Airbnb took the spare capacity of your spare bedroom and turned it into the largest hotel in the world.
Cars could be next. There are ride sharing services, but they are modeled after Zipcars. That pattern works well for cities where driving is rare. For me, driving is extremely regular: get the kids to school, go to work, get groceries, etc. Getting a Zipcar daily doesn’t make sense, so the car sharing equivalents don’t either.
The model that does make sense is leasing, but leasing today stinks. First you have dealerships. Whether buying a new car, buying a used car, selling a used car, or leasing a new car, negotiating stinks, and it takes an actuary to figure out an optimal outcome. Selling a car on Craigslist is really cumbersome too, and Craigslist does nothing to smooth the transaction.