I've been interested in Nano IPS to replace my current ultrawide, but it appears the contrast ratio of Nano IPS panels isn't that great vs. my current MVA panel.
The downside to them is that they're 24.5" and 1920x1080. I'm ok with that because I paired them with my 34" 3440x1440 screen as side screens. However, it's a really low pixel density to use as a primary monitor.
That's the part that sucks. A nice 4k or 5k monitor like the LG Ultrafines will only do 60hz.
All that said, the Alienware screens seem expensive until you look at how much the other 240hz IPS screens cost. At the price, they also come with a nice 3 year warranty and a really good stand. The part that irritates me is they don't calibrate them. One was way off compared to the other, so I'm waiting on a warranty replacement just on the basis that I think that one is not going to be easy to correct.
There was also the tech which was basically an array of really small 1-pixel CRTs, it is too bad they couldn't get that to scale to the pixel densities of OLED.
If you want nicer colours you go for IPS, which has a very slow response time (especially when compared to a CRT).
The only modern display technology that comes close to CRT in terms of colour, contrast and responsiveness, you need to go OLED. And that's great (Oled with scanline emulation and black-frame insertion is incredible!) but OLED has the issues everyone knows about regarding degradation of the organic compounds (burn in).
I want my cake and to eat it, I want great colours and contrast and a stupid fast response time, with a panel that won't burn-in my desktop.