However, in this scenario every neighbourhood only has 2 STORES - and each CUSTOMER only shops at one of these STORES.
Then, if you made HATS, the only way to sell HATS is to get them on the shelves of both those stores.
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This is Australia: two major supermarkets - so the only way to sell a lot of your product is to submit to the terms of Coles or Woolworths.
It's not about the market for apps, or the market for smartphones. Those markets are comparable to any market.
This is about the market for apps ON the apple ecosystem. And the problem that is being solved is: Apple can't have a monopoly on that market, such that they can (for example) charge a commission for every sale.
Basically: we can't allow a company to be so successful that their STORE becomes a MARKET.