Review: Panasonic TX-40CX680B

Introduction and features4K versus Full HD; can you tell the difference? 4K is all about huge TVs, it's about sitting closer to the TV and it's about coming face-to-face with an eight megapixel TV image instead of two megapixels. That's the maths behind the 3840x2160 pixels of 4K material, but what happens if everything – including the price – is shrunk down to 40-inches? That's a conundrum tackled head-on by the Panasonic TX-40CX680B, comfortably the smallest 4K TV to be reviewed so far. At