It seems like most proposals from companies actually making money on the platform (as opposed to folks like you and I in the cheap seats) are to keep the experience the same for the users, with the same amount of value, only charge less.
Where's my 30%? Because the value I provided was critical to that transaction, to that experience, to the value provided. Others could have provided that value, but didn't.
I can make the same argument you make. But I'm not a trillion dollar company. That's the real difference.
Don't like your 1000/month gas bill? Well then you can sell your house and move to the neighborhood next door.
Same principle with the mobile market at this point.
Some states allow choosing the electricity provider separate from the utility providers themselves (creating a competitive market).
In the same way, we should be able to choose between competing implementations within the walls of the mobile platforms.
Absolute control of a platform that impacts a huge percentage of society will not be something that's accepted in the longer term
Stores can then actually compete on merit.
See that's the thing about actual competition is a price can be determined by the market, especially in the case that you have many players rather than a duopoly. In my case Apple could charge whatever they wanted, 30%, fine. But me the app maker could go to the A+ store and pay 10% instead.
Obviously this is wishful thinking, but given how smartphones are a mandatory part of our social life, stores being a public service would make much more sense.