Issue with downloading movies is that people are going to move from being used to having their collection at home on a physical media to having no collection at all and just being able to watch any movie they want at any time for the cost of a rental ( personally I don't see buying movies you download taking off much and lets be honest, if you can at any time for a small fee watch any movie, why would you even buy them ?).
Issue with that is that for the studios they loose the revenue from the sale and get increased revenue from rental, but all in all I would say they probably still loose revenue. ( for it to take off it has going to be cheaper for the customer on average, granted the retailers won't be in between making money anymore from the sale, but still I think the studio will probably loose revenue there).
PS3-Xbox360 gap : 1.5 millions and going up in PS3 favor !
PS3-Wii gap : 20 millions and going down !
