Digital game stores are a great comparison. Lets stick to windows gaming, since I'm most familiar with those. Steam & co did cut out physical media production and distribution, obviously driving the price down. But there is also competition. If EA doesn't want to give Valve a cut, they can try to reach me directly. Steam is my preferred store for games and the only client I let auto start, so that won't be easy. But doable for a good game / price.
Compare that to apple users. As a start, you'd probably have to convince those to buy a non-apple device. That's a huge barrier to entry. It might be justified, i you believe that's good for other reasons like security. But then we're far of from driving down app prices.
I want fine grained competition. It is what makes our economy more efficient. Market leaders in contrast don't want to compete on profitable parts of their business and as such, will employ any tactic possible to stop that. Like e.g. placing barriers to entry (see above). Or make it difficult do make informed decisions (stores reads quite a bit like printers and overpriced ink). Thus I have a hard time buying into those "this is for the good of the consumer" talking point.
