Distance and size makes the most difference.
If you're sitting ~7' back from a 50" TV it really doesn't matter if it's 720, 1080, 4k, or 8k.
You have to be right up on it to tell or have a huge screen.
Nicer TVs do have better color and contrast that you can tell from any distance. But generally you have to have something to compare it to for it to really matter. Dark scenes on a poor quality TV can look awful.
Framing hammer gives more "grip" when striking a nail.
Finishing hammer won't mess up a delicate surface when struck.
They both drive a nail but used at different times. Could you just use one hammer? Sure, but it is harder to drive in large nails with a finishing hammer and a framing hammer will mess up your trim. You'll mess up your finishing hammer if you strike framing nails with a finishing hammer.
A flat iron or a hairstyling iron is a specific tool to straighten hair
A "hair straightener" could be a flat hairstyling iron but it could also be something that doesn't "iron" to straighten. It encompasses more.