With Apple expected to introduce a new line of iPads in the coming months including a thinner, lighter full-sized iPad and an iPad mini with Retina display, Amazon has refreshed its Kindle Fire line, headlined by the redesigned, 7-inch Kindle Fire HDX with a resolution of 1900x1200 at 323 pixels-per-inch (PPI) and the new 8.9 inch Kindle Fire HDX tablet with a resolution of 2560x1600 at 339 PPI. As noted by The Verge, both of the Android-based tabl
