For the last few months I have been running Haiku only on my laptop.
My desktop was running windows 7 and only ran my monitor at 1920x1080 despite I have a monitor/TV that supports 1920x1200. Last week I downloaded the latest window driver and after a number of trial and errors finally got it to work at full resolution.
Since I was doing the yearly backup/clean-up I also install the latest Haiku, to my surprise when booted I go the full resolution on my display. No work involved.
I have problems with Haiku, but it still is better for most things I do.