SONY could make a mint if they sold thier discs to pc aswell as dvd and ps3.
if a game takes 100gb and you need to download it in my area it would take a year as i get around a 70kb/s download speed which is the maximum speed for the town in scotland that i live in which is surrounded by forests and sheep goes significantly lower for about 20 hours of the day its only at 70kb/s for 4 hours of the day.
remember you can get blu-ray discs with 8 layers. which is 200gb