Finally got round to listening to this today. Great stuff, especially about the future of game. Wondered if there was any potential in what GTA IV has been doing with its DLC - big investment in one very detailed and large world which you populate with subsequent self-contained episodes.
Fallout 3 is similar but with GTA you get a new character and new storyline each time, and without the need to build the universe afresh - like (poor comparison) the "Oval Office" of 'Dave' being re-used for 'The American President' and 'The West Wing'.
Still, a huge initial investment I suppose and the idea of licensing assets for use by other studios is, I imagine, a bit ambitious but I have been particularly struck by what GTA has set out to do with its expansions.