So this discussion of the Retina Display coming to iPad is really ridiculous. First read below the description of the Retina Display as quoted from Jobs (found in MacRumors article, "Apple Announces iPhone 4 with Retina Display, HD Video Recording, More"):
"iPhone 4 will also have a Retina Display, a new display technology that packs in 326 pixels per inch, compared to the current iPhone's 163 ppi. Noting that the detection limit of the human eye is 300 ppi"
The "detection limit of the human eye is 300 ppi". This means that at
any distance the human eye can see a maximum of 300 ppi. If the iPad were to double its resolution to 2048 x 1536 it would come nowhere near the resolution required to be a Retina Display.
The current display is 132 ppi and 1024 x 768 with a 9.7" diagonal. 1024/132 = 7.758 (the height in inches of the iPad screen). 768/132 = 5.818 (the width in inches of the iPad screen). At 300 ppi (the Retina Display minimum ppi) the iPad display would have to be 2,328 (7.758 * 300) x 1,745 (5.818 * 300) in resolution to be considered a Retina Display. Additionally, if the iPhone and iPod touch screens are being manufactured at 326 ppi, it stands to reason the iPad Retina Display would come in at the same ppi. This means the iPad Retina Display would most likely be a resolution of 2,529 x 1,897.
First off, that is much higher than the rumored 2048 x 1536. Secondly, do you know what other displays that is higher than... essentially everyone that Apple has ever made. The screen would be the same resolution as the 27" LED Cinema Display (2,540 x 1,920), only in 9.7".
Please Apple, give me a reason to buy iPad 2, impress me. But a display upgrade like that in 12 months? Come on everyone, you ask too much. The cost must be incredible!
By the way, I do think the iPad resolution will double, but truly double. In other words, go from 786,432 (1,024 * 768) pixels on a 9.7" screen to 1,572,864 pixels on a 9.7" screen. This means a screen resolution of approximately 1,448 x 1,086 should be expected.
Thanks for reading my first post!