Hexagonal Tiles - Could this mean we get a true globe for a map?

[Oosh]

If you chuck in 12 pentagons in you can get a tessellation of the surface of a sphere. No more open cylinder or torus (i.e. donut) worlds!

This could open up new avenues of movement, but I think Ice may have to become a new obstacle type for movement penalties, and/or impassible without required tech. Submarines could go under Sea Ice, Planes (esp. Spy Planes which I'd love to see) can fly over it, etc.

Maybe even chuck its melting in there to echo real-life situations such as the opening of the Northwest Passage?

Edit: A Soccer ball is the most recognisable example of this, wiki has a pic (here) with more tiles, and you can keep increasing the number of hexagons but you only ever need 12 pentagons.