Windows 8 seems to be geared primarly towards tablets and touch screen. In doing so they have forgotten their business desktop user, which is a large portion of their market. I would not upgrade to Win 8 in our small business, the support required would be too expensive, even if Win 8 were free. I would however consider using it on a tablet, but Win 7 is so user friendly, intuitive and stable, it would be a backward step to upgrade to Win 8 on a desktop. I will wait on Win 9 which will have a menu, or MS will be the PC equivalent of Nokia.
Alternatives will gain ground, Ubuntu 12.04 have also removed the traditional menu and lost ground to Linux Mint. PC-BSD is a more stable user friendly and free system, based on FreeBsd which is little known but is a very viable replacement. The reason we stick with Windows is that we are framiliar with the windows enviornment, if we are forced to learn a new system then free alternatives begin to look extremely attractive, given the current economic circumstances. So MS give the customer what they want the start menu.