For those who have been Lightroom holdouts, here is a bit of information from the Apple camp that Apeture is ceasing development work:
With the introduction of the new Photos app and iCloud Photo Library, enabling you to safely store all of your photos in iCloud and access them from anywhere, there will be no new development of Aperture,” said Apple in a statement provided to The Loop. “When Photos for OS X ships next year, users will be able to migrate their existing Aperture libraries to Photos for OS.
Apple is introducing a new Photos app and iCloud Photo Library. iPhoto is also being replaced by the new Photos app as a result.
More information can be found at The Loop.