Spotted: Amazon's Kindle Paperwhite with a serious upgrade

One year after the launch its Kindle Paperwhite, Amazon seems to be toying with the idea of launching an upgrade to its second generation e-book reader, if a TechCrunch prototype sighting is to be believed.[caption id="attachment_1248795" align="alignleft" width="380"] The spotted paperwhite prototype looks more in line with Kindle Fire HD tablets. Amazon.com[/caption]Code-named Ice Wine, as per the technology website’s report, the prototype looks more in line with the Kindle Fire HDX tablets. Here are what the specs look like:• 330 ppi display resolution• Matte glass display screen• Squeezable buttons on the edge of the device for a haptic feedback• Custom-built in typography• Lighter weighing device• Ambient light sensor• Software updateAmazon’s Kindle Paperwhite has 212 ppi screen.Currently, the e-reader with the highest resolution available in the market is the Kobo Aura HD that boasts of a 265 ppi resolution, and priced at Rs. 13,999 in India. It is also armed with armed with 1GHz processor and 4GB storage space.So, is this a move from Amazon to one-up Kobo? It may look like it, but the tablet is probably setting its sights on Apple's newly launched iPad mini with Retina Display and Google's new Nexus 7 tablet.The iPad mini with Retina display has a resolution of 1024x768 resolution at 324 pixels per inch (ppi) while the Nexus 7 has a 323 ppi resolution. Amazon, which has largely been playing catch up in the tablet game to both devices, clearly needs a serious upgrade if it has any chance of competing.The device could be released in the second half of 2014, says the TechCrunch report.Till then, keep calm and enjoy reading.