I do agree it is unlikely, but I know that Apple learned that it was the choice and ability that was the big sell and people continue(d) to use Mac OS instead.
In the case of mobile phones, Apple is way ahead in terms of third party software, so I think in their eyes allowing double-booting will not improve the iphone substantially.
What on earth makes you think theyre making their money on the hardware?
Check this graph: http://www.businessinsider.com/chart-of-the-day-in-case-you-...
They're not buying a box of transistors, a quantity of RAM, a camera etc. The hardware is just a box used to deliver a shipment of easy to use, cool enhancement. That's what people are buying. Not hardware.
Apple could never charge what they do if people were just buying hardware. You buy comparable hardware for a fraction of the cost but it doesn't have the other emotional/social stuff and that's where Apple makes their money.
Each of the ipod, mac, iphone are a combination of apple hardware AND software. That isn't split out. Where the graph shows software, they are referring to things like final cut, iwork, etc.