Tom Kalbfus said:
2D is for paper and pen games, but the future is in tablet computers, paper in general will be used less and less. If you don't have to use paper, you don't need 2D representations of 3d space.
Tablets are fine for reference, I always have my iPad at the gaming table and use it a fair bet when I GM, but it's not good for sharing information with other people at the table. For that, paper is better.
The problem with 3D at the gaming table is that interaction with a 3D interface is a solo activity. Discussing 3D relationships with a group, showing those relationships and discussing options outside of trivial cases just isn't practical IMHO. You can print off a subsector map with 20 worlds on it a couple of times and share them round the table and in a few minutes everyone will understand the situation. Trying to do the same with 20 worlds in a 3D environment is exponentially harder to show, explain and discuss.
I do think Pseudo-3D is viable because it's easy to represent on a flat medium, screen or paper, and much easier to reason about than full 3D.
Simon Hibbs