Aperture is more of a pro iPhoto, different from Photoshop.
I disagree. It is a direct competitor to Light Room. If Apple didn't have Aperture, then Light Room as we know it, wouldn't exist.
Even to this day, work flow is much better and faster on Aperture.
Some of us who have been Aperture users for several years are dismayed by Apple's lack of attention to the pro apps. It seems Apple is only interested in its iDevices and couldn't care less about the high end Mac users.