Fred Wilson shared a video of Albert Wenger, his Partner at USV. The speech is quite good and touches on some of the issues I've been talking about – what's the raison-d'être after we reach zero marginal cost of everything.
Interestingly Albert also used the term "share of attention" as a precious resource in that economical end game. It's the same question I raised in an old blogpost "Share of time v.s. share of wallet". I think it's worth watching Albert's video – and then read my post again!