Is the TCL 55T69C good for gaming?

It handles casual console gaming at 4K, but it lacks the high refresh rate and low-latency gaming features of TCL's dedicated game models. Serious players should look higher in the range.

Does it have local dimming?

No. It is an edge-lit QLED set without full-array local dimming, so black levels are weaker than mini-LED TVs. Bright scenes and color look strong; dark scenes less so.

What smart platform does it run?

Android TV, with Google Play apps, Chromecast built-in and Google Assistant voice search. It works well with Android phones and Google accounts.

Do I need a soundbar?

The built-in speakers are fine for news and casual viewing. For movies and music, a soundbar or external speakers make a clear difference.

Is it worth it over a cheaper LED TV?

Yes if color and brightness matter to you. QLED adds punch over basic LED, and Android TV adds apps and casting. If you mainly watch in a dark room, a set with local dimming is a better fit.