koontz told me to post here.
I'm quite on the fence with my vote here.
On the one hand, I feel that the development of a fantastical map is smoother because, eg, it's easier to add a mountain range in somewhere just for the sake of sound gameplay, not being hindered by real geography. And I think there's more potential for funky gameplay on a fantasy map (eg. Dawn of Ages). Which isn't a cup of tea for everybody, I'll grant you.
However, 'real' maps have more...substance, I guess, to them.
Though I fear that we'll end up with some new city map, or another map of a whatever US state.
Some maps, such as Austerlitz, are really disrupted in terms of gameplay because they are limited by real geography/history.
However, maps including Waterloo and WWII Gazala play really well.
But it's possible to have a bit of both.
Let's look at, say, Lunar War. Natty evidently based the map on the real geography of the moon, but applied a fictional approach to it.
So I voted for fantasy in the end.