I think the iphone will start to die off soon anyway - Samsung already have a larger market share, and Nokia are heading for the number 2 spot. I think apple fans (and i'm writing from a mac btw) will, as i have done got very bored very quickly with a new iphone/ipad coming out, struggling to get one, then by the time you have (at some expense as you've either brought sim-free or paid off a contract) you log on to an apple forum to read stories about the next iphone due out soon.
Adding to the pot - apple keep getting little things wrong that damage their reputation that could have been avoided were they not so desperate to push products out - advertising, software, hardware. All because they try and launch a new product when most consumers have only just acquired the current one.
Examples.... well - the above 2 incidents
Dodgy iPhone 4 antenna - with a marvellous remedy from Apple of not holding the bottom of the phone.
iphone 3's bricked by the apparently compatible iOS4 software upgrade (mine was)
When the China factory scandal broke, Apple went down a route of transparency and claimed a smear campaign trying to damage their reputation - i think they do enough of this themselves.
I can't see Apple products 'dying off soon' they're too superior to the competition, I'll most certainly never buy a different phone/tablet whilst they're making iPhones/ iPads.
Your examples are the normal anti Apple brigade nonsense...
Dodgy iPhone 4 antenna - a non issue, all phones will lose bars if you smother then, no one I knew ever had an issue with this...
iPhone 3's bricked - haven't heard this one....
iPad 3 heat issue - I have one and it doesn't get any more noticeably hotter that iPad 2, they don't get 'hot' just mildly warm.
I presume you don't know much about Foxconn - again, this is anti apple propaganda, loads of companies use Foxconn... Apple, Microsoft, Sony, Nokia to name a few. Do heir names get mentioned with this? No. Do they have constant worker reviews and campaign for wage rises and better facilities for the Foxconn employees? No. Apple does though.
As for apples reputation, I have a 4 year old MacBook Pro, at Christmas the logic board went, so I took it o he apple store to see how much a replacement board was, it was £600, but they replaced it for free.... No reciept with me, just the laptop, and they changed it within an hour.
Exceptional products and customer service.