The update, coming sometime in April, will bring Android 6.0.1 Marshmallow to the Robin, along with some much needed improvements to the camera software. As mentioned in our review of the Robin, the camera app took a bit longer than expected to actually take a picture once you tapped the button, especially in HDR mode. This, as well as small improvements to the user interface in both the camera app itself and the gallery have been addressed, and Nextbit says the picture taking is now "at least twice as fast." They also demonstrated this on Twitter.
the April update also was designed to improve battery life by further optimizing the "thermal tuning" for the processor. This should also improve overall performance. In addition, audio improvements should make the speakerphone more clear sounding to both parties, and playback for the Robin's two front facing speakers has been further tuned. One final issue addressed is the viewability of the screen in bright sunlight, which should improve with the April update.
A smaller update is also pushing now, and it addresses "trouble with certain apps like Uber crashing." Expect the big update, and Marshmallow, sometime next month.