I have my own computer service company, and I have to say that many of my clients (residential & commercial) are still running XP, and I only support companies up to about 25 people. I get asked this question alot, and my answer is this: "Is your computer doing everything you need it to do right now, and is the speed and efficiency adequate? If it is, keep what you have, unless you really can afford a new computer. If it's not, now is the time to think about newer technology."
Everyone (and I mean everyone) will have to move to newer technology at some point. No one is running Windows 3.11 anymore or 95 for that matter. We are all forced to move to newer technology because obsolecence is built-in by the big wigs who provide us all this technology. So if home users and businesses want to hold on a little longer to XP, and software is still available for it (which it is right now), I tell them to spend their hard-earned money on something else.
My .02!
