New Delhi, Jan. 10 -- When we started comparing 4K Ultra HD TVs, the surprise wasn't how many options existed, it was how similar the specs looked on paper. A Hisense E63N and a Xiaomi FX 4K both promise 4K, HDR and smart features, yet they don't deliver the same experience once you switch off showroom demo videos. Move up to a QLED like Acer's Ultra V or the VW GQ1 Pro series and the difference becomes obvious: colours finally lift, motion stabilises, and HDR stops looking washed out. Even larger sets, like TCL's 75V6B or Samsung's Vision AI QLED, prove that processing, brightness control and sound tuning matter far more than raw resolution. What we learned is simple - 4K isn't a magic number. At 43 to 65 inches, the real leap comes from...