You make a great point in general, but especially about gaming. It's not hard to imagine a world where "gamification" eventually leads to productive outlets that appear to be "games". In fact, we already have this in crude forms all over the place, e.g., bonuses and promotions in the corporate and military context. That's where the lines get very blurry.

I really like your point about production being useless without consumers, but I suspect that there will never be a shortage of consumers.