Mac Rumors reports that Version 1.1 of Apple's iBooks application seems to have accidentally included some artwork for this hypothetical pixel-doubled iPad
There's been a lot of talk about a "Retina" display for the next generation iPad due from Apple in the coming months, but it hasn't been completely clear what resolution the iPad's "Retina" display would be. Based on Apple's marketing efforts for the original "Retina" display, it would suggest a DPI (dots per inch) greater than 300 to exceed the abilities of the human eye.iPad 2 Likely to Have 2048x1536 Screen Resolution