Knowing next to nothing about Golang: Is it unlikely that someone would ever develop an actual desktop toolkit for Golang? If so, how come?
From a naïve point of view, it would seem like overkill to run a whole web browser when a few kilobytes of memory is all it really takes to draw a widget on screen.
"all it takes to draw a widget on the screen" is not enough to create "an actual desktop toolkit".
If you need to draw a widget on the screen, there's Dear ImGui [1] that you can use from Go [2]
If you're looking for a desktop toolkit, there's a reason why things like Qt are multidecade endeavours.