Well, thanks to an unexpected bonus at work I am now shopping for TV's!! 
I'm trying to source the living room TV as pretty future proof (for the next 5 years or so)
55" size.
I've looked at the LG C9 as it has hdmi 2.1 - some people say this is needed for future consoles for optimum playing. Is this correct?
Or is this way down the line? It is likely I will buy one of the new consoles next year, whether PS5 or Xbox I'm not sure but I would like it to be at its best.
I also would like a smaller tv for other machines I have or may purchase in the future. Therefore a decent tv for Panasonic Q (have component cable) Snes and Dreamcast would be great. This would go in the office so not much bigger than 30" really. Or do I look at monitors as its likely it could be gaming only.
I would love a CRT but the size/bulk is just not practical anymore.
Any help appreciated.

I'm trying to source the living room TV as pretty future proof (for the next 5 years or so)
55" size.
I've looked at the LG C9 as it has hdmi 2.1 - some people say this is needed for future consoles for optimum playing. Is this correct?
Or is this way down the line? It is likely I will buy one of the new consoles next year, whether PS5 or Xbox I'm not sure but I would like it to be at its best.
I also would like a smaller tv for other machines I have or may purchase in the future. Therefore a decent tv for Panasonic Q (have component cable) Snes and Dreamcast would be great. This would go in the office so not much bigger than 30" really. Or do I look at monitors as its likely it could be gaming only.
I would love a CRT but the size/bulk is just not practical anymore.

Any help appreciated.
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