concerning WCIII gameplay, I've been practicing my 3D RTS playability on several different demos. Earth 2150 made an excellent "practice game."
Though it will certainly take some getting use to for some of us, Blizzard has an unsurpassable ability to create the most stream-lined interface I have ever encountered.
I have high hopes for WC3.
"As you do not know what is the way of the wind, or how the bones grow in the womb of her who is with child, so you do not know the works of God who makes all things."
-- Ecclesiastes 11:5