So what's new in the 2009 iMac:
- more RAM: 4GB are standard these days, and they are so cheap even 400$ notebooks have 4GB of ram. And DDR3 is not faster than DDR2, it's hard to feel a difference in normal daily use.
- more harddrive space: 1TB or 500 GB are standard for computers nowadays.
So: one star for now for these two updates.
- the "new" graphics: the GT 130 is a 8800GS, which is a little faster than a 9600GT. So actually nothing is updated (only the name of the GPU). The same thing with the other GPUs: new names, old hardware. Some of them are even slower than the old ATI cards.
Here is a list of all mobile graphic cards, with benchmarks:
http://www.notebookcheck.net/Comparison-of-Graphic-Cards.130.0.html
- the CPUs are the same (I'm not sure but the speed is the same). And no QuadCore!?! OK, its hard to put a QuadCore in a notebook (the iMac uses notebook hardware, besides the harddrives), but for 2000$ they should have find a way to do that.
Now we've got the same machines but at higher prices. It just makes no sence to buy a mac now, when a PC cost half the price and has twice the performance. And don't forget that it's easier than ever to install OS X on a PC.