I know, and I'm aware that this is somewhat controversial. I'm currently preparing a detailed write up including some theory. I would maintain that it's a subjective view of a planar universe that shares most, if not all properties and implications of a first-person position. To me, the problem in terms of terminology is that we've either to create a new class for this with just a single member, like "Ptolemaic multiplayer shooter", or we try to find the best fitting class that's already in use, even, if we might have to restrict the term somewhat.

(This is even more of a problem, as it predates anything alike by 10 years and it's therefor not part of a tradition.)