It's got a lot of potential once more people jump on the iCloud bandwagon. Even people I know with iOS devices often don't have iCloud set up yet. I do love the option for viewing online, but the one Photo Stream I sent invites to a bunch of people for, everyone either called or e-mailed me to tell me that they don't have iCloud, so the can't see them. You can view them online, but the link at the bottom is so small to view online they all missed it. I also wish online there were the options for liking and commenting.