Somehow, typical prices for software on app stores are considerably lower than independently distributed software was. Apple seems to have succeeded at commoditizing their complements, even ignoring the cut they take. I'm not sure how this got established as the equilibrium, but as a developer I don't want to participate in that role, and as a user I wish there was more great software, and suspect there would be if it hadn't become so commoditized.
(I also agree that walled gardens are bad for freedom.)
This is definitely the case on mobile where everything has been driven to 99c or free, but the Mac App Store still has a healthy range of prices, including a bunch of desktop software in the $20-$100 range.
(I also agree that walled gardens are bad for freedom.)