LG supports WebOS 4.0, ThinQ, HDR10, 4K for all models planned in 2018, but Dolby Vision is supported in all OLED TV as well as some part of LCD TV.
OLED TV in 2018
LCD TV in 2018
Reference: https://www.flatpanelshd.com/article.php?subaction=showfull&id=1523522612