>it’s very plausible Apple invests more R&D into custom silicon and/or security in a year than these companies make in total revenue from selling cameras.

Why would you compare all of Apple to the subset of Sony that is cameras? That's a dishonest comparison, especially if you're going to complain about apples to oranges comparisons. Why not Apple camera revenue to Sony camera revenue?

And both have very little to do with the cost to make a secure chip, which either can easily afford if desired. Apple's not spending a significant amount of their budget on the security components, after all, are they?

Certainly Sony makes enough revenue and spends enough on R&D to develop state of the art technology, including security hardware.

>One hopes that Sony learned from PS3

You really think they learned nothing since the PS3?