Yeah, of course, everyone knows this, no one thinks it's some magic storage. That's not what I'm talking about.
The difference is in the interface on how you get your files to some place. With S3 you simply upload the file, and Amazon stores it for you. With Filecoin, it's simply a protocol that allows you to browse everyone who is compatible with the Filecoin protocol, then you make a deal, then you use that deal to upload files. It's like there are many operators like Amazon providing a S3 interface, but first you need to find one you like, then strike a deal.
The workflow is vastly different.