Do you know Moore's Law? According to her, every 18 months the number of transistors on a chip doubles, maintaining the cost of manufacture. This law applies to processors, but Avery Pennarun applied it to LCDs and came to fabulous conclusions. But before going to the juicy part, I want to recommend reading the full article: excellent, very didactic and even hilarious, in a very good way geek.
Well, to the point: if we do the math with Moore?s Law applied to LCDs, we?ll find that, to achieve the same pixel density as an iPhone 4, the iPad would take three and a half years adding up to the time it?s released, We have the Christmas 2013 as a magical day that would happen, for a launch in 2014.
It's just that Apple doesn't need to make an iPad with more than 300ppi, to be able to say that it has a Retina screen, because the normal distance of using a tablet is much greater than that of a smartphone. In addition, doubling the resolution is the ideal way to adapt the graphics of apps that have not yet been ported, as shown by TiPB.
Da, we can expect Apple to increase pixel density sometime in 2012 (perhaps hitting stores only in early 2013), thus obeying Moore's Law and keeping gadget manufacturing costs more or less constant at the launch date hey, everybody loves it when products improve specifications without increasing price, right?
(via Daring Fireball: 1, 2)