I do not beleive Apple is killing hardware.
They will not want to, certainly.
But they will inadvertedly. That's exactly what happend with NeXT. NeXT had brilliant hardware. But they were just a tad bit more expensive. If given a choice, people will go for cheaper.
Intel builds reference designs for motherboards. Anyone who uses them, like e.g. DELL, will always be able to offer hardware boxes for cheaper.
If Apple designs their own, then they will not be price-competitive - and lose most of their hardware sales in the end. Up to an amount where they will no longer make any profits. Faced with continued hardware losses they will have to shut down their hardware business eventually.
Yet if Apple were to use Intel's reference design, then they're not much better off either. Dell will always be cheaper as they have a much larger economy of scales. Same for any Taiwanese or Chinese manufacturer.
Apple can try to play the design card and hope that more people are willing to pay a premium price for better hardware. But Apple barely makes profits on hardware sales today (excluding the iPod). And that is with people being forced to buy Apple hardware to use OS X. Without those people, hardware losses are guaranteed.
The only solution would be a 'proprietary Intel' box. One that is so special that it won't run Windows and Mac OS X won't run on any normal Windows box either as it needs those special components.
But it will only be a matter of time until that can be cracked. PC users are modders! A lot of them. I trust that they _will_ find a way to mod their Intel box to run OS X - as long as OS X is compiled for Intel.
And that will likely even be a pirated copy of OS X where Apple will not even make a software sale...