I can picture an epic adventure/puzzle game, definitely. With planes to get around haha (in time lapse cut scenes, a la Indians Jones 
…travel around the world to investigate and solve the mystery).
I don’t see a race track or even rally course (anything in that scale really) being able to be done better than they do in the dedicated race sims/games. Where they laser scan the road etc nowadays to get every measurement, angle and bumps/ridges exactly perfect. It’s never going to have that detail in the FS globe?
Even the latest Dirt Rally, even though arcadey, looks fantastic and very believable detailed locations with some awesome surface detail and trackside modelling. Lighting is great too and it runs at a fair lick.
We need to think of bigger scale that more naturally matches the scope of the world we have.