I see your point about “interactivity,” although what I copied from John’s post was that aspect of the analogy that struck me as clearly troubling, leaving open the possibility that other parts, like the assumption “interactivity” has a common meaning in both cases, may be problematic as well (hence the final clause in the last sentence): indeed, perhaps as you say, even more fundamental in that regard. I simply had not thought enough about that to make the claim with the confidence you do here (if only because of my very limited experience with and knowledge of video games!).