Hey,
I only recently joined but enjoyed this discussion.
I certainly agree with retroarcade 4:3 is only really way to go. Regarding the CRT and TFT/LCD there are actually some strong arguments to use CRT and not use CRT.
CRT are well known for producing ionising radiation, and although we are talking about a small about of X-ray radiation <0.5 milloroentgens per hour at a distance of 5cm from an external surface to 21 CFR 1020.10 regulations set by FDA in the US.
CRT since 2007 should be well below that limit. Older ones, not so much.
CRT flicker and periodic scanning of CRT although instant response and no lag can be more perceptible to some people than others, whilst some people may see a smooth experience of their arcade, others may see significant peripheral like effects from scanning that is offputting and unpleasant. I am one of those people, sadly. 75hz is really the minimum for me. 100hz is a preference though!
Some CRT have hf noise that can be really darn annoying, and to be fair, I have an old Iiyama Prolite 19" E2208HDD that suffers that condition itself, so it's not just something CRT's suffer from. The lag input vs input quality is a tradeoff to consider, I think. Which is more important?
In fairness though CRT are pretty good and there are some trinitron's that I actually miss, that said, I've got them out before and they _arent_ that clear as I remember them being, but the POC monochromes I had before that were so much worse it's probably understandable.
There's some really good reasons not to throw out the CRT, because actually they are quite hazardous to expose and are full of cadmium, lead, leaded glass and phosphorous, re-using them means that the environment will be spared for a little while longer, and you will have the respect of the EPA or your local environmental agency.
I think that CRT is an unmatched legacy, and it's criminal to waste a good thing, but there are some other considerations too, a persons visual acuity, the displays brightness, emissions, flicker , input lag. These things matter folks, I think that CRT vs TFT is not a black and white question, but I suspect I am probably overthinking this

Ultimately as good engineers of any kind we make decisions which are best for the use, or at least that is the way it is _supposed_ to happen, but great engineers have a tendency of finding ways to re-use stuff, and that's A - OK to me

Best wishes,
Adam