https://www.theverge.com/2019/1/7/18171209/tcl-6-series-4k-roku-tv-75-inch-announced-ces-2019

TCL isn’t finished with the 6-Series lineup of TVs that it announced at last year’s CES. After releasing 55-inch and 65-inch sizes of the 4K HDR Roku TV to rave reviews in 2018, the company is launching an upsized 75-inch model at CES 2019. Preorders begin today, and it will ship over “the coming weeks,” so you’ll see it in stores before most of the brand-new TVs debuting this week in Las Vegas, most of which won’t be available until the spring. As with the other 6-Series sets, TCL’s new 75-incher offers full support for Dolby Vision and HDR10, and it runs Roku’s easy-to-use software.

The 75-inch 6-Series has full-array local dimming with 160 local dimming zones compared to 95 (55-inch) and 120 (65-inch) in the smaller sizes. More zones is generally a good thing because it allows the LEDs behind the TV’s LCD to be more granular and precise about what sections of the screen are being lit up, allowing for deeper blacks and improved contrast.