I'm sure planets and spaceships could be rendered beautifully. My main concern is how humanoid characters would be portrayed. The Clone Wars look takes some getting used to, but would a more cartoony, less realistic look be better?
I'm still hoping for live-action. Why not an animated series and live-action at the same time? They'd be on different channels and focus on different audiences, no need to worry about cannibalizing the audience.