Sounds like a cool idea, but the site is not loading for me (stuck on loading spinner, no errors in console) - in Firefox/Mac.
Syncing content is a pain - the most convenient way I have of sharing data between my iphone and my mac is taking a photo of the screen! It takes 1 second and I don't have to open anything on my desktop.
Obviously that's a hack, so anything to make this process easier sounds good to me!