iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Aperture Replacement 'Photos' to Offer Image Search, Editing, Effects and Plugins
Ars Technica was able to get additional information from an Apple representative, who indicated that certain professional-grade features would be coming to the new Photos app:
When asked about what Aperture-like features users can expect from the new Photos app, an Apple representative mentioned plans for professional-grade features such as image search, editing, effects, and most notably, third-party extensibility.Some of these editing features are already depicted in the screenshot that Apple released of Photos at the time of the announcement:
The screenshot shows an adjustments panel with settings for Light (Exposure, Highlights, Shadows, Brightness, Contrast, Blacks), Color (Saturation, Contrast, Cast), Black & White (Hue Strength, Neutral Boost, Photo Tone, Grain), Definition, Vignette, White Balance, and Levels.
Apple has promised that existing Aperture users will be able to import their libraries into the new OS X Photos app. Photos is expected to be released early next year.