Hello, I'm interested in Cogmind, but wasn't sure if 21:9 resolutions (2560x1080) will be supported in the future?
Not in the future, no, they're supported now :P
That said, resolution height determines your font size, and that's a pretty wide aspect ratio! So it'll be using the size 18 font, and your map view will end up showing a fairly wide area.
You can see what the different fonts and resolutions look like on this page (http://www.gridsagegames.com/cogmind/ui_preview.html). (Right now there are players using 3840x2160.) And while I don't have a sample up for 21:9, you can see the 1920x1080 sample and imagine the map view (and top) simply showing a wider area. An extra 640 pixels would mean about 35 extra columns for the map display.
...
Eh, what the heck, I threw together a (very quick and dirty) mockup (https://i.imgur.com/1BnQJkE.png) for you in the right resolution by editing the 1920x1080 image :). Open that up at full size on your screen and that's about what it will look like.
I bought it. :) Thanks for the help! (Currently using Mac with wineskin.)
Awesome, thanks for your support as well!