I've suggested this before: They could always go the route of 8 SPEs and loads of regular cores. Backwards compatibility and more developer-friendly.
The cost sunk in PS3 will never be recovered. The dependence on blue lasers for the BluRay drive cost a bundle, both in initial BOM and in insufficient volume to compete with Microsoft early on, leaving PS3 to play catch up for the rest of this generation.
Then you have the debacle with the GPU. It is interesting to read media from three years ago, press reports of Sony using TSMC as a "second source" for RSX. That is putting positive spin on a very dire situation. The truth is that Sony's fabs had a costly upgrade to produce CELL, then sold to Toshiba for a song because it was under-utilized. Makes you wonder. Why second source when you have a half empty fab?
I'm guessing that RSX was such a late contingency solution that they didn't have time to transfer the RSX design to Sony's fab and that TSMC initially was the only source. That however is speculation on my part.
Notice, none of the above is down to execution problems, it is all because of bad design choices.
To sum up, PS3 has:
1. Cost Sony billions.
2. Finished Sony as a semiconductor company
3. Only managed to end up third of the three platforms.
No wonder Kuturagi were fired,
I think it's one way to interpret the events...
In my view, the RSX chip choice and Cell design have their merits. The problem is more with Sony's organizational and execution issues. The software and marketing folks didn't get their hands on the goodies early enough to do their job well. The executives were not on talking terms with the lead man, Kutaragi. Even if PS3 took a different design route, Sony would have faced serious challenges anyway. The economy would still go sour, and I am not sure if the semiconductor business would do well. It requires a lot of $$$ to fight the nextgen chip design war also. I think Sony as a group should try to focus on one thing/platform.
I believe it's still too early to say Blu-ray is a bad thing. First and forth most, PS3 has not been hacked yet thanks partly to Cell, Blu-ray and the firmware combo. There is no need to fight piracy like PSP, Xbox 360, and DS. Secondly, Blu-ray sets the stage for standards play. It is a forum where all media companies are onboard. Whether you want to push 3DTV, decoder, digital distribution, media applications, storage size, etc., it's a good place to look or even start. It helps to set Sony onto a platform path. From consumers and studios' perspectives, it is vendor-neutral... so we are less likely to get stringed along, or coerced into an unfavorable position especially since digital distribution has very stringent DRM. Finally, it represents a growth business right now. Without which, I think "Sony Electronics people" may be in a bigger limbo. The problem here could be: Sony is not exploiting the Blu-ray platform further enough (e.g., Why is Netflix bundled with Blu-ray players without some Sony tech or video services ? Can Apple come in, embrace and "steal" Blu-ray away from BDA ?).
One can argue Sony could have done better by focusing their resources elsewhere. May be, may be not. With the same organizational challenges holding PS3 back, I don't think they can execute well either. Microsoft will still be spending more money to buy exclusives or timed exclusives, they would still engage in price war, they would still have XBL, a lot of cash and their software talent pool; Nintendo will still have Wii. Will a super-PS2-without-Blu-ray do the job ? Sony could compete faster and better, yes; but I don't think it would be a game changer. On top of that, they may have to handle piracy too.
I think PS3 is problematic for Sony because it is at the center of Sony's controversial organizational challenges. PS3, Cell and Blu-ray are victims of Sony's policies. Not the other way round. OTOH, if they could make PS3 successful, they would have also solved many key challenges that have been plaguing Sony Group for decades.