Blu Ray won the format war off the back of the PS3. HD-DVD had just about everything in it's favor (it was cheaper, ready earlier, had players earlier, and had more studios backing it), and I really don't see how Sony could have won the format war without the PS3.
The PS3's high manufacturing costs were an investment to making blu ray a success. And it's only fair to account for the profits blu ray generated for Sony when determining if the PS3 was a net positive or negative for them.
Maybe adding blu ray and yanking up the cost of the PS3 was a bad move, but until you can show me how much Sony has made off of blu ray licensing fees, it's premature to say that was a net negative for them.
Not only is blu ray selling really well right now, it's fair to say that blu ray will be around for a long long time, and will be netting fees for Sony that whole time.
Without the numbers to support that, it's just guessing whether it was a mistake or not.
Do you have a link to their operating report, or any report showign what the influx of income from bluray actually is.
Blu Ray has taken off just fine. Blu Rays adoption has significantly by a wide margin outpaced the adoption rate of both VHS and DVD.
They sold 3 million blu ray movies in just the first 11 weeks of 2008. And since 2008, many different sources have all reported a large surge in blu ray sales.
http://www.blu-ray.com/news/?id=1147
Selling tens of millions of blu ray every year doesn't seem bad at all.