Is Apple Readying Dual-core, Quad-core iMacs?

Currently, Apple offers iMacs in 20-inch and 24-inch sizes, with two different configurations for each size.
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Long due iMac upgrades have slowly started tipping rumors. The rumor mills are now eyeing Apple's iMac for update since the Mac Mini didn't get any update in recent MacWorld expo. It's been rumoured that Apple is going to refresh the iMacs with dual-core and quad-core processors according to a report by CNET.

Shaw Wu, of Kaufman Brothers, believes that Apple will be updating the iMacs line up. Currently, Apple offers iMacs in 20-inch and 24-inch sizes, with two different configurations for each size.

The new refreshed iMacs will get a high-end quad-core chip and a low-cost dual-core processor. The highest-end 24-inch iMac will get a high-end quad-core processor while the 20-inch version will get a low-cost dual-core processor. These new iMacs can be expected soon as Apple has reportedly decided to reduce 24-inch iMacs shipments in coming weeks.

To complement this rumor, Intel is set to launch new quad-core server processors by end-March which might be used for new Mac Pro iterations.

If this stand's true, Apple fans will get to choose dual-core and quad-core iMacs. Recently, many OEMs like HP, Asus, Lenovo and LG have come out with all-in-one style computers. To lead this segment, Apple really should refresh its product line-up.