If you are not patient enough to wait for the product of the next generation, go with the LG OLED CX 48-inch TV. With the release of the RTX 3080, a lot of PC gamers will take into consideration upgrading to a 4K display. In spite of the fact that the RTX 2080 Ti is best at 4K 60Hz gaming, the RTX 3080 widens the horizon for 4K high refresh with performance in a lot of details going close to or more than 100 FPS with Ultra settings.
This is where the full advantages of a high refresh 4K display are in need, with smoothness exceeding 60Hz panels. However, for the best 4K 144Hz monitor with true HDR quality, you may need to wait more.The only options you can choose from the current market are the Acer Predator X27 and Asus ROG Swift PG27UG, which used to be highly recommended in the past but lately this year, they are using outdated technology. The lack of DSC means that you will only receive 4K up to 98Hz with 10-bit HDR or 120HZ with 8-bit color. 144Hz can not be accessed outside of chroma subsampling, which is not an ideal solution and you may hesitate to choose this as it comes with an over 1000-US-dollar price.
In 2020, you are going to witness new 4K 144Hz HDR monitors like the Asus PG27UQX with mini-LED lights and the Acer Predator X32 bringing about HDR quality to a panel of 32 inches. However, they have not been released yet. Instead of paying 1500 US dollars on a monitor with the old technology, it is better for you to wait.
The LG CX 48-inch monitor provides a 4K 120Hz OLED panel with per-pixel local dimming. Thanks to this, you are going to receive a really outstanding HDR experience with deep rich blacks and high-quality contrast ratio. The response times are 1ms, which is ideal and this TV also supports HDMI 2.2. With the RTX 30 series supporting HDMI 2.1 from Nvidia, you can get 120Hz with 4K refresh.