MS and Apple will I suspect end up streaming an OS to a basic processing box which facilitates connection of a monitor, keyboard, mouse and speakers in exchange for a monthly or annual subscription.
The way Office 2013 is being distributed is an example of this as is Office 365 and the Chromebook.
I've had to learn to use Win 8 in order to support it for the day job but personally I much prefer 7, 8's interface has been developed for those that care mostly about facebook and twitter which personally I cant be doing with.
To wade into the Mac and IBM PC clone debate the Mac chassis is undeniably well built and the machine has always excelled in the creative space as the OS leaves more of the hardware resource for the use of the applications but as the components in new Macs are now pretty much the same as a PC I really don't think they warrant the inflated price tag as what you are paying for is the chassis mostly.
In a PC config (and I'm running a 3rd gen i5) the CPU still requires a heatsink and fan but Apple's approach in most of their machines is to use the whole case as a passive heat sink and these get very warm, I wonder whether this will reduce the life of the CPU because it is not being sufficiently cooled.
Virgin (ADSL) => Namesco => Newnet => O2 => Plusnet => Zen => Newnet => Zen => Freeola => Vivaciti (using O2 Wholesale DSL) => Xilo (C&W Wholesale) => Xilo (O2 Wholesale)
Note: I don't lay turf for anyone. astro or otherwise, all views and opinions expressed are my own based on experience.