https://www.techradar.com/news/tcls-impressive-6-series-4k-roku-tvs-finally-have-a-release-date-and-price

Part of the TCL TV 2018 line-up, the TCL 6-Series 4K Roku TV is, ostensibly, the best budget TV coming out in 2018. TCL has finally announced the specs, pricing and release date of the 55R617 and 65R617, and they’re far and away some of the best value-per-dollar screens we’re likely to see in 2018.

The 55R617, for example, will boast 96 Contrast Control Zones (up from 72 on the TCL 55P607 that we saw in 2017), in addition to Dolby Vision and HDR10 support. It will pack HDR Pro Gamma - a technology that helps the TV retain its HDR looks while in a bright environment - and TCL’s Wide Color with NBP Photon technology that uses high-output LEDs with precision phosphors to deliver a more saturated image.