Why they think it's 2048x1536
The sad thing is, just why they assume the resolution will be 2048x1536:
File name conventions for images for the new iPad2 vs the original iPad ask that the iPad2 images have an X2 in the filename so the iOS can automatically display the proper images for the new device (likely due to a resolution bump). Now, X2 could be gen2, but very likely could be "twice as big" x2 multiplier... Guess which one makes the best news story? Even if it is x2, the 2048x1536 guessed resolution is taking the current 1024x768 and multiplying BOTH dimensions: 1024x2 = 2048, and 768x2 = 1536 and boom: x4 screen. LIKELY what they're using the x2 for (if it is indeed indicating a multiplier) is a rounded PIXEL count. Current iPad displays are 786k pixels, so 2x786k = 1.57MP. Granted, reversing that down to a 1920 screen leaves only 819 for the x9 side instead of 1080, this discrepancy is likely just because it's easier to say x2 than x2.63671875.