I looked it up on a computer planet site and it's in stock at the store nearest to me so I guess it's a possibility to go and see the actual thing. A lot of people say you don't really notice 4K unless you are 50"+ but I'm not sure if this is true or not. I often find it quite hard to judge differences in a brightly lit store.
In terms of 4K, the most I've done is nose around a few stores.
Based on that I wouldn't worry about 4K below 49"ish sets.
Also, in store, generally they use good quality 4k HDR sources which is unlikely to be the case for common use.
This LG interested me as I saw it reported as a very good upscaler of SD/HD content and obviously the current prices are attractive.
If I had a silly budget the picture quality of large screen OLED was clearly a bigger step than 4k/HDR on it's own, but the truth is I don't care enough about the quality of the image to pay that kind of money.
While we are at it, there seem to be a never ending list of gotchas on TV's at the moment.
8 v 10 bit HDR
HDCP 2.2 on HDMI 2.0 ports or Not
cheapo tvs sometimes with only HDMI 1.4 but 4K screens
Panels that are not actually 4k but marketed as such
120Hz that isn't actually 120Hz but marketed as such
Interfaces that do stupid things (read that one sony had insane number of clicks to change mode to game/source)
Smart TV OS's that only support very limited apps
Wifi but no 1gb ethernet
response time
Partly the reason I'm tempted to pick an amount of cash, stand in a store and take a punt at a lowish cost TV, rather than attempt too much research and buy overly expensive new tech.