I looked at the Feelworld 2200 nit FW279 monitor spec. If it is as bright as they claim then it should be visible in the brightest of sunlight. With a Rec 709 color gamut it is plenty good enough for our needs. The resolution of 300 dpi is plenty for our needs. IPS (in plane switching) LCDs have the nice 160 degree viewing with no substantial color shift but may be a bit compromised at the highest temperatures. I see nothing in the spec stating the operating temperature range.Take a look at the specs on the Feelworld 2,200 NITS monitors and let me know what you think, with your years of screen experience. It would be interesting. These are designed for photography and Video monitoring use in the field, so the colour is expected to be very good quality.
The biggest, deal- killer, issue that I see is that it is just a monitor and not an Android device, so the input is only HDMI. I wonder how you would hook this up to your drone. I tried, unsuccessfully, to use other tablets that were not fully Android capable (so called forked Android) and had trouble even side loading the app. This isn't any kind of Android device, just a video monitor.