What does Apple's sales numbers for their desktop and laptops indicate ? Apple users/fans will continue to buy Apple machines; people on the fence who are looking at either a Mac or a PC might be influenced by the factors you describe.IMHO The reason Apple is considering terminating the use of INTEL icore processor is because average computer buyers realize the hardware is basically the same for PC's. Once you compare hardware between PC's and Apple systems the only difference is the OS and the 2-3 times premium you pay to get a comparable Apple Computer.
I'm not nor are many many more willing to pay that huge premium to get the same Computer hardware, but that it has the name Apple on it.