Gamerace on 09 December 2008
I doubt it'll use either DVD or blu-ray. It'll probably be a higher density disk than Blu-ray (that way they'll look more high-tech than last gen) unless that is simply too costly or perhaps a propritory HD-DVD format.
I expect MS will also be looking at making all games downloadable but even still some physical media is a must (at least for next gen).
