I think thats a little silly. There clearly is a difference between an incremental update of a product from a 5th to 6th generation (which is also hard, important and can be impressive or unimpressive) and a release or update that is a Big Deal in the way the iphone 1 was a big deal.
The reality is that under Jobs, Apple did some big things. Macs (which you you might call several big things). ipods, iphones, ipads. These all had very big impacts on technology, economy & culture. You can't expect these kinds of things to keep coming every three years. Maybe they would have stopped even with Jobs. But, at some point, a post Jobs Big Thing needs to happen.
I saw needs to happen and that's a little harsh. Realistically, Apple are an enormous company. Several very successful product lines that can carry them a long way, perhaps through several successful CEOs. Incremental improvement on those product lines is not the end of the world. There's no reason the iphones and ipads can't last as long as macs.
I guess that in the maybe category then :) (I haven't used one myself).