Probably. Although it's worth saying that phones are the PCs of 10 years ago, whereas games consoles are still just games consoles.

Consider that the profit margin for a train line might be something like a few percent, and that's for a capital intensive industry, these companies charge 30% for what?

This is why they should regulate so that no product, where it can be reasonably applied, should have a single app store. If you want to pay more for a better service that's fine, but with no competition it's just a racket.

> should Sony/MS/Nintendo also drop their percentage?

Yes.

> How about the cut stores get to put products on their shelves?

No.

A digital store has an essentially unlimited capacity and carrying a new product involves doing a review and adding a new record in a database. Kroger, on the other hand, has to do this and manage limited shelf space.

The limited resource in an app store is the slot in some promotion carousel. Go ahead and charge whatever you want for that.

Sony/ect don't have nearly the same market dominance over a huge industry, as compared to Apple.

Apple has 50% of the entire US smart phone market.

This is a significant larger amount of market power then those other situations.

Kroger buys wholesale, and sets the prices in it's store independent of what it paid (presumably they want a profit, but it could also be a loss leader). And there is no lock-in for a grocery store (i.e. I can buy the identical product elsewhere). This is a false equivalency.