At this point, it seems like a Retina display in the iPad 3 is a pretty safe bet. After two years, and two iterations, of the same screen resolution, we fully expect Apple's next tablet to feature a much sharper display.
Much of the tech world seems to be convinced that that display will be of Retina quality — which is a huge deal. And to demonstrate how huge, designer Chris Koerner put together a rather interesting infographic...