Amazon has unveiled significant updates to its Kindle line, introducing a color option and enhancing functionality across models. The new Kindle Scribe will feature AI-powered text summaries and improved note-taking capabilities, priced at $399. The popular Kindle Paperwhite receives a display upgrade to seven inches and 25% faster page turns, starting at $160. Additionally, the base Kindle boasts brighter lighting and a new 'matcha' green color, priced at $110. The Kindle Scribe is set to ship on December 4, while the other models are available now.