I wish more folks would make this distinction. Going one step farther I set out to create a layer on top of Dropbox that was optimized for photos (and videos).
Essentially, give a proper photo API to the files in your Dropbox. Things like date searches, plotting photos on a map, etc.
Then another step beyond that. Migrate between any storage service without losing a single feature, keeping every URL in tact and a mobile app which continues to work as if nothing happened. Dropbox is great but it isn't future proof either.
Then the last (and probably most important) open source it all.
I tried OpenPhoto a couple of months ago, but I was left with the impression that it was optimised for photos and video didn't work so well.
We just started working on video support so you were left with the correct impression. We released 4.0 on trovebox.com a few months ago and should have it available as a certified build for self installation this week.
It's not perfect, of course, but we're making tremendous progress.
Very impressed with the OpenPhoto initiative too.
After struggling with the increasingly slower speed of iPhoto (similar to the article author), pretty wrappers on top of file systems/Dropbox look like the foreseeable future of photo library management.
I wonder if this is something new that Dropbox is rolling out in stages. I still only see Photos added via Camera Upload.
And yes, I'm a paying Dropbox customer, so that's not the distinction.