There has been a lot of talk around the computer industry that the desktop is dead because of lack lustre sales, from my personal point of view this is rubbish and a incorrect analysis of the actual situation.
The way I see it is that for the first time ever users can buy a fast, reliable computer at a reasonable price with a reliable operating system that works. Why would you need to upgrade or replace? Desktop computers have come of age!
In my own case I have owned 4 computers in the past and currently have a three year old quad core computer (Chillblast Sidewinder) that cost less than £1000 running Windows 7. For the first time I'm using a computer but loads programs virtually instantaneously, runs them without having to wait for a program to catch up, meaning that I can work or play the way I want all the time.
The two reasons that I am not thinking of upgrading or replacing my current computer is
1) For the first time I do not need more performance or reliability
2 ) As a mainly desktop user I can't see that Windows 8 is going to offer me much extra than I have now, If Windows 8 were a direct upgrade from Windows 7 with more relevant and new features to the desktop I would have bought it. I certainly don't want or need Metro.
Eventually I will replace or update if I encounter hardware problems or there is a new showstopper program that I need which won't run on my current configuration but this won't happen any time soon.
It has been said that tablets and smart phones are replacing desktops, from my perspective tablets and smart phones are in ADDITION to desktops and all have their place. I have a high-performance 10 inch Android 4.1.2 Jelly Bean tablet (Toshiba AT 300) and a smart phone (Samsung Galaxy note 2 ) which are great when I am not home or in bed for browsing the Internet or simple games, but for all serious work I would much rather use the desktop. Mice and keyboards are precision implements, much easier than using an imprecise finger. For me touch screens are irrelevant for serious work, I have tried it and always revert back to my desktop (which I am using now).
Long live the desktop PC!