Well, it is the spiritual successor to Total Annihilation. It's what Chris Taylor wanted to do since he was calling it RTS 2.0. From what previews and fansites know about it so far, it looks as if the same concepts in TA have made it through - mass and energy as resources, balancing continuous resource income with expenditure rather than peon harvesting, construction units being able to replicate structures and possibly other units at will, and possibly the ability to divert construction units to help factories build units as well. If you haven't played TA, I imagine it would be a good taste of what's to come with SupComm.