I used to own a Garmin dashcam and even though I really enjoyed the lat/lng overlay on the screen, I think what would be even better (especially for actioncams)

I used to own a Garmin dashcam and even though I really enjoyed the lat/lng overlay on the screen, I think what would be even better (especially for actioncams) is to have a little map on the right upper corner of the feed like the "picture-in-picture" feature in some TVs. The map would obviously need to be downloaded onto the device beforehand but that really shouldn't be a problem.