Time to move on
Sony still makes good products, but they are just too slow to innovate. They showed with the PS4 that they can get things right, and the camera division has shown signs of out innovating Canon and Nikon.
Where they get things wrong is where they think the Sony name is enough for market share, without the technical innovation to earn it. For too long a time they traded on the Sony walkman brand, long past the point when it had any market relevance. Same with the TV branding when they seriously missed the boat as the market moved from CRT to LCD TV's.
Also they should dump the entertainment division. While it makes a profit, it also holds back innovation by requiring the media consumers to kow-tow to the requirements of the media producers.