What do people think about parring a 32" 6K monitor with the Mac Mini 2018 and a good eGPU? Will that be a smooth experience?
A good eGPU that can already drive dual 5k displays and supports DisplayPort 1.4 ought to be OK with a 6k display. (Obviously the standard Intel iGPU wouldn't touch it... and no pre-2018 Mac supports DisplayPort 1.4 because only the latest Intel TB3/USB-C controllers do).
However, it all depends on whether Apple wants to make the new display exclusive to the Mythical Modular Mac Pro - if Apple don't want the Mini to drive it, it won't.
Also, if its a
Thunderbolt display most eGPUs won't drive it - AFAIK its only the two, somewhat expensive, Apple/BlackMagic eGPUs that can drive Thunderbolt displays.
We're also assuming that its a 16:9 display - i.e. an enlarged 27" 5k. Since "6k" refers to the horizontal resolution, an ultra-wide screen at 6000-and-something x 2880 could fit the bill.