The only thing I was baffled about is the new Photos App on the Mac. Why would it take until next year for them to release that? How could it not be ready by fall? How complex of an application could it be?
not sure.
my "logic" tells me that, if the photos is delayed as long as 10.10, then likely it's heavily integrated into the core code of the operating system in some way, rather than just an Application that sits on top.
there are benefits to doing this way. it makes it more heavily integrated with the operating system that allows you to in thoery give the OS control over the photos and such.
For example:
in an "app based" photo app, that is stand alone and not heavily integrated. If you wanted to access the photos from a 3rd party, Either that photo app would need to have some open hook for that 3rd party program. It could be slower, or harder to program for (i dont know, I dont program)
Integrating it into the OS could mean that, 3rd party applications only ever have to ask the Operating System through an standardized APK to access the data within the other App, needing no extra hooks into the photo app for access to the photos.
Downside however is your photo's program is bound to the operating system. Which generally means slower updates and it's not as easily replacable.
in Android (FOR COMPARISON PURPOSES ONLY, i AM NOT judging which one is better, this is objective comparison only). Having photos as an App rather than heavily integrated OS feature means that you can adjust the photos app on it's own and distribute it via App store quicker, without th eneed to make additional OS level updates.
But this could explain why the new photos won't come till 10.10 and can't just be added on top of Mavericks
However, this is just my speculation, Apple might have a different reason.