The meaning of Win7's sales numbers

Microsoft is understandably pleased to announce that Windows 7 is off to a strong start, claiming they have sold more than double the copies of any other operating system over the same time period. Despite the market gains by Apple, Google and Linux, this tells me that Microsoft's season of desktop dominance is far from over. Vista was truly a mistake, just like Win98 and WinME. But Win7 has accomplished exactly what Microsoft had hoped it would do.... make a Vista a memory.