Find a crack in the modern world, insert your app and charge rent. Market capture would be when so many lots are part of it that you have to use the app to get a spot.
Speaking of cracks, how about if I make an app, HereISit, for reserving washroom stalls? You reserve a slot, it takes care of queuing, tells you when you’re up, and your phone unlocks the stall. Add a rating system, personal walls, etc.
Market capture would be when if you don’t use the app, you’re … shit out of luck. 
Anyone want to drop half a billion investment?
