No, it's awful to take a desktop concept file system and slap it onto a mobile device. There's nothing inherently wrong with a file system, but they're often not very intuitive and present a complication of average users. The best thing Apple has done in the last 7 years (IMO) is to make computing devices so accessible for people who aren't considered tech-literate.
Truth is, a LOT is from Apple. Don't forget that Apple has been around for a long time, and without them a lot of the things we take for granted in tech land wouldn't exist. They patented a lot of those things too. Common sense helps too. Pretty easy to see the line of demarcation pre-and-post-iPhone. And the iPhone was based on the original Newton, and a lot of underlying technology has it's roots from pre-OSX Apple.
D'okay... before we continue, you should go watch the keynote. The demoed the new keyboard with predictive text buttons. LATER, they demoed third-party keyboard extensions, and explained how they're sandboxed for security, unless you specifically give them network access.
Don't forget the Newton... oh, wait. A lot of the patents Apple is trying so hard to defend were patented back in the 90s, or are related to IP invented back then. People act like Apple is a newbie in the tech world.
Did you watch the keynote?You can access iCloud from within apps, open (compatible) documents from different apps in the current app, etc.Also, the TITLE of this thread includes the words "third-party keyboards", which were also demoed. iOS 8's default keyboard is a whole other topic.