TVs: is it worth paying more for technology such as OLED?

I want to upgrade my set, but I’m wondering if coughing up more will improve the pictureEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.Our 32-inch Sony TV is nearly 10 years old, and doesn’t have Netflix or Amazon on it. We want to upgrade to a 50-inch screen, but are baffled by the terminology – 4K, HDR, Oled and so on. There is a Samsung 4