The TCL C6K series represents TCL’s leap into QD-Mini LED display technology, combining quantum-dot color enhancement with mini-LED backlighting for improved contrast, brightness, and color accuracy. The series supports native 144 Hz refresh rate throughout the signal chain, enhancing motion clarity for sports, gaming, and fast action scenes. 

The TV is powered by the AiPQ Pro processor, which uses a suite of AI tuning (Ai Contrast, Ai Color, Ai Motion, Ai HDR, etc.) to dynamically optimize picture quality. The “Precise Dimming” system divides the backlight into many local dimming zones to reduce haloing and improve deeper blacks. 

On the audio side, it features ONKYO-tuned audio with a more capable speaker system than entry models. Smart capabilities include Google TV / Chromecast built-in, voice control, quick settings, and energy-saving modes (adaptive brightness, dynamic brightness, etc.).

According to reviews, the TCL C6K delivers great value, with features like 4K at 144 Hz, VRR (FreeSync Premium), ALLM, Dolby Vision, and a gaming focus. However, some noted limitations: limited image enhancement options (e.g. no advanced tonal smoothing) and mild blur in very fast motion depending on settings. 

In short, for your 50-inch variant, you get a high-end feature set with modern display tech that competes well at its price point.