Hmm, some said BR was a dumb decision.. I tend to agree. Blu Ray did kind of kill Sony here. I believe it added some 200 bucks on top of the production of the Ps3. It really wasn't needed for gaming, and with the rise of digital distribution one might wonder if BR is worth it at all. DVD is STILL doing better at retail after all. Its pure speculation on my part, but a DVD Ps3 could've been released for 300-400 bucks and perhaps Sony would be in a much better position right now.
There is one keyword for Sony though; Innovation. They are severely lacking there.
They got away with offering the same thing at a time when a graphical upgrade was enough. The Ps1 was a gaming console like the other competitors for example, it offered what Sega and Nintendo did and it was succesful. The Ps2 was really same thing but with even better graphics. That worked out back then but now the success lies in bringing a new experience to the table rather than just the same thing with prettier graphics. Nintendo came up with the Wii and its motion controls, and won. Microsoft one-upped that with Kinect and is succesful as well. But all Sony did was offering a carbon copy of the Wii-mote and obviously lost. The same thing could be said for handhelds, the PSP is not that much more than a GBA with prettier visuals. The DS however was actually a new experience.
Also, Sony forgot to take online play seriously during the Ps2 era while it was obvious that it would become significant for the consoles. Sony is constantly playing catch up with PSN as well.
As a first day Playstation gamer I want Sony to be succesful again, but I'm not certain. They need to be a step ahead for once instead of following.