I would not recommend a TV for gaming unless one happens to find latency benchmarks for the display. TV's tend to add enormous amounts of delay their buffering and pre-processing layers, latencies that really don't matter if you're displaying a movie.
rtings.com has latency benchmarks for most that I saw, including separate ratings per display mode (1080p, 4k, 1080p game mode, etc). It was invaluable when I was researching what to buy.
