You see that worries me (i know its paranoia) that Apple is trying too hard to hide the computer from the user. Sure it makes it all pretty and magical but thats just it. Newer generations shouldn't be growing up thinking computers are magical, they should know at least about the filesystem structure and I even think every person should have a basic knowledge of a programming language. I feel like hiding the computer from people is making them less computer literate. A majority of my friends and family don't know even HTML or how the internet works and thats a scary thought to me. Computers shouldn't be "magic".
I'm starting to come around to Apple's way of thinking. I'd be hard pressed to find any reason to have a file system other than it being nice to see all my files together in one place. I mean there are already file systems in iOS, you want to see your picture files go to the pictures app, you want to see your documents go to pages, pdfs goodreader, etc etc. I'd ask the question why in particular do you need a central file system? If the OS runs well and doesn't need any tweaking from the user, if you can easily find whatever file you are trying to open, and if with today's announcement they are making your files ubiquitous in that they will be automatically synced with all of your devices, well with these things I'm starting to see why there isn't a need for a central file system anymore.
I've fought against the death of the file system, but I think with icloud Apple is going to convince a lot of users. I'm starting to see these things as appliances such as a TV, you don't have a central file system on a TV, but you can still access what you need whether it's a menu, or a netflix movie.