There are rumors, too, that a new UI is coming and it may make sense for Microsoft to hold on to that UI for the RTM builds, so that it has one last surprise to offer up to its eager fans. Indeed, the smartest thing Microsoft has done with Windows 7, in many ways, is keep the drama high by playing things close to the vest. That said, our first RTM-level build, build 7106, doesn't really offer anything in the way of revelation. (A newer build, 7107, has also leaked recently, and we can expect more to come in the days ahead.)