Amazon released an updated version of their premium Kindle - the Kindle Oasis. I still think the Oasis does not justify its price and the label 'premium' is marketing than anything substantial. However, at least with this iteration there is something, on paper, that justifies its existence. The important upgrade is the screen size - the updated 7 inch screen is the first non-six inch e-reader that Amazon has released since the Kindle DX. The size increase, finally, is a welcome addition but the size does not justify the device's pricing; the same point, to a lesser extent, applies to waterproofing, Audible integration, 8GB storage and the greater number of LEDs for a more uniform front light.
I don't expect a refresh for the Kindle Paperwhite or Voyage soon and when a refresh arrives it is possible these devices will not get the larger screen. I think the significant demand for a larger screen - something admitted by an Amazon employee here - is being used to differentiate the high-end Oasis (the first generation offered relatively little for its 'premium' label) in comparison to other Kindles and to entice users to purchase the higher-end device. In my opinion, at the moment, the Paperwhite remains the best Kindle to purchase. For a larger e-reader, the better option is to go for the 7.8 inches Kobo Aura One or the first generation 7 inch Kobo Aura H20.