Yup i got the game.
Everything is changed...
1. Firstly, the graphics is totally unbelievable, when i changed from sim city 2 to 3 i thought 3 was pretty amazing. But when i played sim City 4, the game is like architect graphics. Everything is so real.
2. Secondly, the game invovles more strategy now. Before in sim city 3, i would just built alot of dense residential to get huge income. But now, you need to build medium density and stuff. Its harder to earn income too. Also you need to slowly chang the medium density to high density. You need to calculate where all the zones and public services are too.
3. Thirdly, there is disasters which are very fun killing your sims
Anyways its a good game overall, but after you fill up the whole map

which took me a while, its pretty impressive seeing your city at work. ^^
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"Why do you have to quote others when you can quote yourself?" (Quote by me)
Is God willing to prevent evil, but not able? Then he is not omnipotent.
Is he able, but not willing? Then he is malevolent.
Is he both able and willing? Then whence cometh evil?
Is he neither able nor willing? Then why call him God.
You see things, and you say 'why'. But i dream things that never were and i say 'why not'.