Guess what? IMG got to check out Myth III at E3 and they said it was cool!
First, the 3D units are amazing (previous Myth games used 2D units on a 3D battlefield). They are significantly better than the still shots that have been released. The movement is fluid and realistic, and slight variations have been added to keep everyone from looking identical. For example, typical infantry might be right or left handed, and they may carry a sword or an axe. Their stats are the same, but these slight visual changes help keep the look fresh.