I was simply stating stream would make a better comparison than a console manufacturer selling games on physical media.
Part 1: "It would be fairer to make a comparison with a purely online gaming distribution model like Steam."
It would not be fair to make that comparison since the two models have fundamentally different underlying fixed and marginal costs.
Part 2: "Apple and Google don't have as many realworld costs once their infrastructure is working and is in place."
Apple indeed has other significant "realworld costs", especially the development, maintenance, and future research to extend their hardware platform. Steam does not have those kinds of costs, and therefore does not need to build in those costs into their margins.
Sony and Nintendo burn and load their software onto cartridges or discs .. they create stock, they package stock, they store stock, they move stock - they sell stock. These are real world (physical) costs associated with production and distribution.
Comparing Apple or Google to one of these suppliers is ridiculous because Apple don't use physical media for their software.
You made this comparison - I told you that steam would be a better (not perfect) comparison - because, like Apple and Google .. they sell via a download mechanism.
Apple/Google don't use physical media, like Steam, sure... but that single similarity is not sufficient to prove Steam is a "better comparison". So, again, Apple/Google are much more like console manufacturers than Steam, and their deal is comparatively better than PS/Xbox/Wii developers get.
Steam sell IP through digital channels .. Apple/Google sell IP digitally. Console manufacturers (historically) sell IP on physical media. Both involve markedly different business models - a comparison is ridiculous.