Chris Koerner was curious about what the oft rumored resolution of the iPad 3's Retina Display would look like compared to previous iOS devices, so he whipped up a little image that compared each devices' resolution against each other. The 2048x1536 screen would dwarf everything.
If the 2048x1536 iPad 3 retina display turns out to be real this year, oh god almighty it's going to be glorious. A 1080p image would be smaller than the iPad 3's display! And remember, all those pixels would only be on 9.7-inches (probably). The 2048x1536 display has been the resolution long expected on the next iPad because it's double the resolution of the first two iPad's screen (1024x768), when the iPhone's Retina Display was introduced, it was double the resolution of the previous iPhone's screen.