I like how you end the post with ''Sony isn't doing too bad''. Their financials and public image would tell a very different story. The PS3 has basically destroyed SCE financially and destroyed a massive part of their brand image as well. There have been countless stories from mainstream media talking of the failure of the PS3, whether it's true or not is actually irrelvant at that point, people read it is failing and so don't want one.
The PS3 is one huge screw up. People always try and say it made blu-ray win the HD war yet there is no evidence that blu-ray wouldn't have won without the PS3. I mean maybe blu-ray would have won regardless of the PS3's involvement. Secondly it isn't even clear if the HD disc war was important or not yet, DVD is still far bigger in sales and digital content is beginning to take off.