Apple rumored to be testing a quad-core iPhone with a 720 display

The first is, in addition to dual-core processors, Apple is testing a quad-core iPhone. It is not clear if that technology would be even be ready in time for a release, but it is reasonable to think that Apple would at least be open to testing a quad-core option to see if a balance could be struck between speed, price, and battery life.
Obviously, coming off the release of the iPhone 4S, these are very early rumors. It will be interesting to see if any of these speculations end up holding any water in the future.
source: Macerkopf via Redmond Pie