Amazon introduced updated versions of the Kindle and Kindle Paperwhite on Wednesday, only a few hours after inadvertently leaking them both. The Paperwhite is getting one of its biggest design refreshes ever, with a larger screen that’s completely flush with the bezels of the device, while the entry-level model is getting updated with a pop of color and some speed improvements. We got to try both at Amazon’s launch event in New York City and came away impressed. Neither is a reinventio...