I think blu-ray has done Sony more harm than good, and i feel it is the reason Sony will most likely not win this generation of consoles.
This is why...
-Lack of Blu-ray diodes limited number of Launch PS3s in US (got off to bad start=bad media)
-PS3 have launched for about half the price if it wasn't for the cost of Blu-ray (lower price would=many more sales and would have stopped Sony getting bad media for the price)
-PS3 had to launch half a year later in EU because of Blu-ray diode shortages. (lost 1/2 a year of sales in one region)
-Bad initial sales lost Sony many exclusives (DMC4 comes to mind)
Although if Sony did not add Blu-ray, they would most have most likely lost the format war. They have won the format war at the expense of scaring the PS brand.
