Oddly enough, you could accuse them of, once again, stealing ideas from Xerox PARC (and, once again, be redirected to Douglas Englebart et al) ... the kind of thing Apple is demonstrating with iCloud, iOS5, and Lion is essentially the computing paradigm described in a Scientific American article on Xerox PARC in the 80s (I wish I could give the exact issue, but the article described four basic kinds of computers - post-it notes, slates, desktops, and wall screens - all, except the post-its which were a rough prototype with a rudimentary display, sharing a common UI with data stored on the network.)
An interesting remark that touches on this topic on The Talk Show was (and I paraphrase) "how come this [the app-centric universe] feels so reasonable and natural and yet has taken so long to come". In fact, there was a huge detour in the opposite direction exemplified by OpenDoc (on the Mac) and OLE (on Windows). How many of us remember copying a table from excel, pasting it into PowerPoint and getting some kind of weird icon? In the 90s the idea was to remove the app and make the document (or perhaps the workflow) the center of attention. This may actually have been a Good Idea but it was (in the case of OpenDoc) badly conceived and not especially well-implemented. Or, perhaps, it was just too far ahead of its time.