I really haven't noticed any shortcomings in performance of my iPad, iPhone and iPod touch, but some are suggesting the introduction of another core would assist in making your iOS device run more applications...as tasks would be spread across several cores.
"Apple is on track to refresh the iPad by March and iPhone by late summer. A key component upgrade across these platforms will be a dual-core processor featuring a pair of 1GHz ARM Cortex A9 cores" this is according to Ashok Kumar of Rodman and Renshaw yesterday.
I would expect this slide to look different at Apple's event to announce the iPad...
The iPad will certainly need to make an upgrade to a dual-core to compete with the upcoming Motorola tablet and BlackBerry PlayBook which both have dual-core installed.
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