Two points to make - Linux & W7
1) I have a Samsung NC10 Netbook which was supplied with XP. Despite being a great little piece of kit, it has lain unused for the last year or so, as I did not want to risk linking it to my home network, and have newer hardware. Last week I needed an extra PC to connect to the internet, so I installed Ubuntu on it (downloaded onto a thumb drive), and its fantastic. It allows the NC10 to be useful once more, and the learning curve is not as steep as I feared, after using Android phones and tablets for half a decade. I truly believe that the end of XP will (well, should) encourage people to try Linux.
2) I bought a windows 7 PC last night. It's still readily available on new PCs from Chillblast. In fact they highlight it as their recommended OS.