I like this discussion! IMO its an interesting idea and an important factor of tabletop gaming - virtual or f2f...
I mainly play f2f tabletop (DnD) and try to step into VT...
My players like fast battles.. after one hour they start doing crazy things... i think their time to concentrate on one scene is very limited (maybe they suffer from the alcoholic intoxication^^)
Therefor simultanouisly movement wasn´t practibel. And now i thought about a projector and this idea.. this would be practiable.
I guess one of the problems for any round-based system is the effect of having interception occur in the middle of a round. What happens then? You can't give them a full round, but can't really force them to stop doing something either.
Let´s talk about DnD battlerounds.. The round is cut into 2 Phases in both phases could occure movement and actions. So lets say everyone has a movement of 60 feet for one round, if he had moved more than 35 feet he cannot do an addional action other than movement. Now if you have in mind that you could divide a round in phases and give anyone involved a valuable for movement and action AND you make this custemizeable - i think you could handle this for any wargame with a good result.
But we've gotten way off the "3d" topic. I may split this to another thread if anyone wants to continue the wargame discussion...
There is much discussion about 3D out there, but i think its in the earliest state of development and still far away from any practicable solution. Therefor i don´t see the importance to discuss about 3D implemented into MT... but simoultanious movement is an interesting thing - and it should be discussed by users.