This is potentially good news for all us old Sim City fans. The graphics have been polished, the game is now in full 3D and it looks like the simulations running the city has become more complex than ever.
Every unit, house, factory and so on runs its own simultation (The Matrix anyone?…) that visually gives the player feedback. As an example, a factory will only produce pollution if it has resources to run and the animations will change accordingly.