What does the text look like on the LG 6K screen? Is it clear and sharp? I guess it is a matte screen too?
I don't have the LG 6K yet as my pre-order ship date isn't until November, but I have used and owned multiple screens with comparable pixel density.
I really don't like the text on 4K 32" screens. One I had in my house was the Asus ProArt PA329CV. That is a matte 138 ppi IPS screen which is Retina at about 25". I sit at about 22", and recommended ergonomic guidelines are usually about 20" or more. If you sit far away, it may be fine, but if you sit closer than 25" you may notice the degraded text. The closer you sit, the worse it will look. The Asus ROG PG32UCDM is 31.5" or 140 ppi, Retina at roughly the same 25".
The LG 6K is 31.5" 224 ppi, Retina at 15.4", matte.
I currently have a 5K 27" iMac 218 ppi, Retina at 15.8", and a 4K+ 28.2" Huawei MateView 164 ppi, Retina at 21". I also have an M4 MacBook Air at 224 ppi (same ppi as the LG 6K).
Text on the 218 ppi glossy 5K iMac is stellar, and text on the 164 ppi matte Huawei is very good, from this ~22" seating distance. Text on the 224 ppi glossy MacBook Air is also stellar of course. Although the Huawei is supposed to be Retina at 21", I can still notice a bit of softness to the edges of text at my 22" seating distance, even if I can't make out the individual pixels. This is due to the lower pixel density (since I'm pretty much right at the edge of it being not Retina vs Retina) and likely exacerbated by the matte coating. Like I said though, it's still very good, just not at the same level as the much higher pixel density Apple Retina displays.
I expect the text on the matte 224 ppi LG 6K to be excellent and a nice upgrade over the 164 ppi matte Huawei, but likely a bit of a step below the glossy 218 ppi 5K iMac.
Compared to all of these, text on the matte 140 ppi 4K ProArt 31.5" just sucked in comparison IMO, but YMMV. It looked better when I sat further back, but that doesn't work well for me.
Summary:
Text quality at my seating distance:
220 ppi (5K 27" and 6K 32") > 164 ppi (4K 27") >> 140 ppi (4K 32")
4K 32" is about 138-140 ppi.