I think a lot of the problems people face is that they don't really understand business.
I'm sure everyone can remember the old Western movies where you have some very clever confidence trickster selling a bottle of Elixir from the back of his wagon. The guy claims it will do everything from cleaning stains of your clothes to being an aphrodisiac.
Well basically business today is no different and Apple really are masters of the art, though as said all businesses do it.
They rely on a few things to be successful -(1) they have to carry you along with all the hype and (2) they rely on the fact that human beings love having new things, even if quite often they don't need them.
The keynote speech is today's equivalent of the guy shouting to the crowd off the back of his chuck wagon - it really is as simple as that. Apple simply need to carry everyone on their wave of anticipation.
I suspect that once the bills start to roll in a couple of months time many people will have buyers remorse. They will say to themselves what an absolute fool I was to spend all this money when I already had something that works perfectly well, or I should have bought something that wasn't going to land me with all this debt.
Will most people publicly admit to that - well of course they won't. Some really honest folk will, but most will silently grin and bare it vowing never to be so stupid again - until the next time.
I think you just have to recognise things like the Apple keynote speech for what they are i.e. huge selling opportunities. The internet has made this sort of hard sell much worse as it's instant live and global.
I'm sure lot's of people will reply as to why they haven't fallen for this, but we all fall for it at some time or another, whether it's Apple, other businesses or even politicians trying to get your vote.