If you're thinking of checking out the best Black Friday TV deals this year for an upgrade to your existing TV set, there are two big questions you need to think about: how much of a difference are you really going to notice; and how much do you need to spend to see a difference that's really worth having?
The answers to these questions will depend on your old TV's age, its size, and its screen tech. I can't possibly cover every model here, so I'm going to offer a crash course on what you can broadly expect in terms of upgrades, depending on which year you last bought a TV, and tell you which new models to look out for that will deliver what you're looking for.
