As expected, Kobo released two e-readers - the Kobo Aura One and the Kobo Aura (Edition 2). The Kobo Aura 2 is a six-inch e-reader that comes with an E-Ink Carta screen and a lower 212 PPI. The eBook Reader rightly states the Kobo Aura (Edition 2) makes little sense. The Kobo Glo HD is an e-reader with a 300 PPI E-Ink Carta screen and is only $10 more than the Kobo Aura Edition 2. The price differential is minimal that it becomes difficult to understand how this device fits in the Kobo e-reader line up.
The 7.8-inch Kobo Aura One, on the other hand, is an innovative e-reader. I am interested to see if Kobo managed to get the front light to work with the larger display (early reviews appear to be positive about the front-light). With the front-light comes a blue light filter termed 'ComfortLight PRO'. ComfortLight PRO, in the words of Kobo, works by "reducing blue-light exposure, the enhanced front-light technology protects your eyes and provides the best nighttime reading experience. The automatic setting mimics the sun’s natural progression, emitting the optimal brightness and hue based on the time of day".
The device's main negative, judging from this review, is the little work done by Kobo to improve the PDF reading experience. You still can't highlight and annotate and the touch to zoom appears to be inconsistent. Thankfully it might not be a serious problem, as KOReader should release a version for the Kobo Aura One.
Amazon may respond to Kobo, in regards to hardware enhancements. However, judging from the past - as posted before - I don't think Amazon will release a larger e-reader. History tells us Amazon responds to hardware enhancements - e.g., front light and screen resolution - but ignores, since the Kindle DX, screen size differentiation. Also, Amazon operates at a different level to Kobo and may judge a turn of direction, to include a larger e-reader, a risk. The uniform six inches is viewed, by Amazon, as the right size for an e-reader - light and the size of a paperback book. Further, to go large means a re-think of the Kindle line-up.