DisplayMate has posted an exhaustive display technology shoot-out pitting the Retina Display of the new iPad against the screens found in the iPad 2 and iPhone 4. Giving the display an overall grade of “A”, the report calls the new 2048x1536 panel “excellent”, with a lower average screen reflection than the iPad 2, and higher maximum brightness. Black levels were found to be slightly better on the iPad 2, although still “very…