In my mind, two factor authentification is a killer feature here. Now if they can also have password-protected link sharing, this will be a much better choice for small businesses or privacy-minded individuals.
Obviously two-factor is good (though strong passwords and discipline are really no worse for personal use). But I don't think "privacy-minded individuals" are going to be heavy users of cloud storage.
Do they actually have 2-factor authentication, though? The French translation seemed to include it, but I don't see any mention of it here.
Edit: Yep, it does have it. Interesting that they don't mention it anywhere in the blog post or on the official site - you'd think it'd be a selling point compared to Dropbox.