New 28″ iMac at Macworld 2009?

Reading a article on Appleinsider about maybe the iMacs will be upgraded to the new intel i7 cpus and also maybe a 28 inch model? I am looking to upgrade my own iMac, but what has been putting me off is the Apple hardware was getting quite a bit behind with high prices on old hardware compared to the newer i7 Windows machines. Now if they are going to launch some i7 iMacs, and the price is right, I shall again be looking at a new Imac, rather than a windows machine. Guess we all will find out Tues , whether any of these rumours of new models are close to what Apple will really release 😉