As much as I hate to disagree with Aza Raskin, this is possibly the worst example of icons becoming obscure. The floppy disk icon is hardly going anywhere; it's pretty much ubiquitous and universally recognised, despite having lost the original meaning behind it.
If anything, it's similar to how road signs describing trains still have a silhouette of an old-fashioned steam locomotive, even though these days they're hardly anywhere to be seen.