Exactly. Especially since it's in a place where %90+ of the readership has a Dropbox account (which is more than adequate for at least smartphone phots/videos), I'd hoped to understand how this differentiates itself.
I can explain difference between Loom and Dropbox. I am not affiliated to Loom, I am just a beta user. I am also a payed Dropbox customer.
Dropbox is great for general purpose files, and files you edit (doc's, pdf's, etc). Is just like a general purpose folder that is synced to the cloud.
Loom is focused only on media content (photos and videos). As opposed to Dropbox, were you navigate files and see pictures thumbnails, Loom organizes pictures in albums and displaying them etc is awesome. Also sharing pictures with other's is very well thought out, you can easily share 100+ pictures in an instant.
I would say Loom is like the iTunes of Pictures. Dropbox is like iCloud.