Every feature you add to software adds to the complexity of the user interface. That balance is what Apple is so good at. It seems to me that layers and masks go beyond photography to image manipulation. Apple has been very clear what Aperture is: a tool for photographers, not a tool for designers or graphic artists. I think Apple would create a new product aimed at designers (and/or Photoshop users) before they'd add layers and masks to Aperture. But I could be wrong.
2/9/10 at 10:53am