I suggest you watch some gameplays or tournaments.
It is the ultimate RTS game i'd say. And whart makes this RST war game soo fun to play is it's views, you can zoom in to go upclose in a small battle to personally give your units multi commands (like keep mooving and firing) to beat the odds. And zoom out to get wide range map view which is best for commanding like 500 units in many squads. It's totally customizable. And the experementals, oh they took my breath out.
EDIT: Humm, damn I over looked your last openion,
well, Suprime commander's theam is "future wars bitwen three planets" and future is alwys unreal to the present. Men flying in the sky was unreal in the past, wasn't it?