One of the things I really like about MM, is that I can easily upload my pictures from my mac to a gallery, boom everyone gets an alert that there are new pictures, boom they can view them on their ipads, boom they can view them on their apple tv's, boom. All with one click. Some of the integration is just very nice.

I know, I could upload to picassa or flickr and with certain devices people who see the pictures easily, download, etc., but nothing really integrates it ALL like apple and their ios platform. For the GP's it makes it SOO easy, I even their computers setup to just download from the SD card, upload to their MM space and boom everyone sees the new pictures. (it actually does it even more automatically if they use the Eye-fi card)