According to Amazon, this update gives the Kindle Touch a number of features, including: a new user interface, better support for graphic novels, improved ancillary content like author's bio, enhanced parental controls, whispersync for voice, better integration between samples and purchased ebooks, and time-to-read (a feature that estimates your remaining reading time).
At long last the Kindle Touch can now read the digital comics that Amazon launched with the Kindle Fire in 2011. To be more exact, digital comics can now be read with Kindle Panel View, the directed-viewing mode that you to read a comic book panel by panel.
The sample feature now works better, too. When you buy an ebook after reading the sample, Amazon will now automatically start the book at your last reading location in the sample and delete the sample from your Kindle Touch.
This update also give the Kindle Touch the same parental controls that Amazon has added to the Kindle Fire and Kindle Fire HD. Parents can lock down the web browser, Kindle Store, and Cloud (aka archived content) with a password, protecting their kid from accessing questionable content. Readers can now to find more info about the author of the ebook they're currently reading, all from inside the ebook. When reading, you can tap the Menu icon and select About the Author.
And of course Whispersync for Voice, one of the high points of the Kindle event last Fall, now works as well on the Kndle Touch as it does on the Kindle Fire HD. Readers can switch back and forth between reading a Kindle ebook and listening to a separately purchased Audible audiobook without losing their place. This feature also works to sync your reading location with other Kindles as well as Audible apps for OS and Android.
This update was released in the first week of March, so chances are a lot of my readers have already downloaded it. But if you haven't received the the v184.108.40.206 update you can download it manually and install it yourself.
You can find the update at Amazon.