While I blame Apple for being too secretive with a professional market that relies on predictability, I understand what Apple is doing with the Photos.app and I'm patiently waiting. I haven't run scared to LR although I admit I did briefly consider it. The Photos.app isn't just an app, it's a platform at the operating system level. With extensions featuring large in iOS and with devs already taking advantage, it's clear what this will mean for Photos on OSX. Apple will build a very capable photos organizing and editing tool whose library any external app can access. If you're a semi pro, the native organizing and editing tools might be enough. If you need more, you can get an app or an extension that satisfies your additional needs. You won't manage a separate photo library with those 3rd party apps. They'll access your Photos library and using the API, follow the rules on how to edit your photos so you end up with non destructive edits available to the entire operating system and even to other 3rd party apps. Once you've done your edits, your photos will exist in Photos and with that be easily found via OS level search and organizing tools in the Finder. I can see some fancy Aperture tools disappearing but only because they'll be replaced by more capable modern tools. For example, the loop will be gone but only because you can pinch to zoom and pan much faster using familiar OSX gestures on your touch pad. Rather than individual projects and folders, I imagine that photos will use OSX's tags to label projects, clients, type of shoots, content in the photos, etc. You can then create Smart Folders that will show you all the photos from that client or all your studio shoots or all your event photography for example. Apple is going somewhere big with this as they usually are when they scrap a successful product and start from scratch. I can imagine Canon or Nikon taking advantage of this extensibility and automatically connecting your SLR with your Mac, iPad or iPhone and importing your photos on the fly. Perhaps even something like CarPlay for cameras where Apple's OS appears on the camera if you're within distance of an iCloud Photos connected device. I'm an event photographer and I've been doing a lot of my editing on location live from the event using my iPhone 6 Plus and I'm impressed at how capable it's been. I look forward to better integration once Photos.app launches so that I can upload photos in full res at the event and continue editing on my Mac once I get back to the studio.