The new Sony a7S II (Amazon/ B&H/ Adorama) mirrorless camera was announced last week. According to the Sony Alpha Universe Magazine, Sony a7S II will be released with uncompressed 14-Bit RAW still image capture in October 2015.
Source says Sony a7R II will also have uncompressed 14-Bit RAW still image capture with a new firmware, which is expected to be coming soon.
From Sony Alpha Universe Magazine:
Sony Electronics, a worldwide leader in digital imaging and the world’s largest image sensor manufacturer, has today announced user selectable Compressed and Uncompressed 14-Bit RAW image capture will be featured in the new α7S II once it arrives in stores this October.
Additionally, they have announced plans to add user selectable compressed or uncompressed 14-Bit RAW still image capture via firmware update to additional cameras beginning with the recently introduced α7R II full-frame mirrorless model.
See more at Sony Alpha Universe Magazine
If you can’t wait to see some visible improvement of the new 14 BIT RAW, here is image of Sony a7R II (7 Bit RAW) Vs. Nikon D810 (14 Bit RAW).
See also Sony a7S II sample images
Read more Sony Camera Rumors