To add:
It may make sense for Sony to rely on brand name, and try to "milk" the PS3 (if you can call it that) as much as they can, and squeeze out any profits they can. Because it seems like the brand loyalty is there to be able to do it. (Of course, no company will ever admit that they will do this.)
By milking, I mean that invest/spend only what is necessary to keep up the product and not make it any better than the competition.
In the meantime, they can try to figure out a new product to replace PS3 (whether online, new console, etc) and see if they can regain their "dominant" status ala PS1 and PS2.
Because for either Sony or MSFT, if they don't have that "dominant" product which generates "significant" profitability - then there is not that much economic sense to continually invest money for the possibility of ONLY low or decent returns and not windfall profits.









