Of course, now the question is going to be what Apple does for an encore. It is very dependent upon the iPhone right now, perhaps too dependent. iPad is turning out to be a very mature product (sales are down again this quarter). It, as well as the Mac, will produce respectable and relatively reliable profits, but not much, if any growth. The Watch is an unknown, except that it is limited to the existing iPhone market.
iPhone 6 and 6 Plus does seem to be prompting the "mother of all upgrades." The issue will be whether Apple can grow that more, or whether the iPhone settles into a steady pattern of annual and biennial upgrades of existing users. A faster A9 in the 6S alone isn't likely to prompt many upgrades from the 6 or "switchers" from Android the way that the larger screen of the 6 and 6 Plus did this/will do year.