I loved the original Homeworld - the idea of full 3D Movement was neat, it had so many tactical advantages, and watching the fighters swarm and the freighters fire off massive cannons was always neat, plus, Hyperspace Jumping added some great strategy/evil-ness to the game. Can't wait to see this one, will add on an edit after I install and give it a whirl
EDIT - Tried it and...WOW, they added unit upgrades, and the neat fact is that you need the addons to the mothership/carriers to create more ships, which, IMO, also makes the carriers a bit more necessary. Can't wait for the full version!