I think the best results might come from adding a black border. WipEout videos suffer a bit because they're fast and action packed. With a black border to take it up to 720p you would get the increased bit rate of the HD option, almost none of which would (presumably) be taken by having the black border there. So I guess you'd essentially get a 480p video but with a higher bitrate and therefore better quality....I think....maybe. But don't quote me on that.