People have been saying this for years. I remember in 2003, when people whined about how the nascent Mac OS X (as it was called at the time) still had a concept of folders and files that needed to be in specific places. They wanted to "keep everything in a database" instead, like BeOS (never mind that BeOS also had files and folders in specific places; that was beside the point).

Ten years later, the filesystem hierarchy is still around. Nowadays, with the Internet's hierarchical domains and URI paths, I don't think there's any risk of it going anywhere. That notion of files in a space hangs around because, simply put, it works. People know what files and folders are, and hardlinks notwithstanding, they generally behave the way people expect them to. It's too easily-understood to throw away, not matter how hard people try.