After playing the SC beta, it reminded me a lot - and I mean A LOT - of a game called High Command, which was released in 1992 by Three-Sixty, the company of Harpoon fame.
HC had many problems, including a lousy AI and no multiplayer support, and faded away into nothingness. But the look, feel, gameplay - to tell you the truth it seems near identical. Just wondering if some of the SC developers worked on that game of yesteryear.
Here's a link to the only HC web site I'm aware of:
www.ryanbailey.com/hicom/hicom.html