The biggest deal for Sony is surely to sell enough HW after HW profitability is reached, and enough SW through the whole life of PS3 to cover initial losses and have a profit overall. A smaller deal about selling in the late life of the gen is that being the best seller during those years gives a little bit of free advertising, keeping the brand name well known before and during the successive gen launch. We know that strong brand name isn't enough, PS3 lost the leadership despite having the strongest brand name at launch, but it helps anyway.







