The problem with Sony isn't the quality of their products. The problem is that they're trying to sell electronics at boutique prices in a market which is looking for value-for-money. While the economic downturn hasn't stopped consumers from buying electronic goods, it has had the effect of turning most consumers towards electronics that offer better value at a cheaper price. Sure, a Samsung TV may never offer the same quality as a Sony TV, but when it comes at half the price and still offers a perceived value that's more than good enough, it's no wonder consumers have flocked there over Sony's pricier offerings.
I'm going to use guitars as a handy example of the sort of thing I'm talking about: Fender and Gibson both used to be guitar companies that focused on high-end guitars at high end prices. However, with the rise in Japanese, Chinese and Korean manufacturing, people started being able to buy electric guitars for much less money than Fender and Gibson were asking.
Fender realised this early on, and changed their production line accordingly. They started investing and putting their name to guitars that were not as high end as their most top quality products, but which were much, much cheaper, and still offered incredible value for money. Within a few years of being set up, the cheaper Japanese branch of Fender was carrying the entire company, and turned their entire fortunes around. To this day, a mid-priced Japanese Fender guitar is still seen as one of the best value guitars on the market, simply for how it balances lower pricing with still impressive standards.
Gibson, on the other hand, put their fingers in their ears, and kept selling their guitars with incredibly high price tags. They used the Epiphone brand as a way to sell cheaper, lesser quality guitars, but anything with Gibson on the headstock still came with a premium price. The problem was, they simply couldn't compete. They had a steady market among successful musicians who could afford to buy their products, but they completely lost the market of everyday guitarists who instead bought cheaper guitars that offered better bang for buck. I believe Fender is now currently producing around 1000 guitars a day, an astronomical number in the industry.
Sony needs to start acting more like Fender, and less like Gibson. The average consumer doesn't care for paying an extra couple of hundred dollars for higher resolutions, or OLED screens. They want something that presents the best price/value possible, something affordable, workaday, and which provides the best quality at a knowingly lower price range. Until Sony deign to start competing on that front, rather than trying to dictate things from the higher end of the market, they'll never recapture the market they once had.