Well the big Vista experiment proved to be a flop, instead of Vista becoming the next XP, Vista instead looks more like the new Windows ME or at best the new Windows 98, an also ran OS with unclear benefits that don’t weigh high enough on the scale to even get anyone enthusiastic about the new OS let alone spur large scale adoption.
And so while buyers keep demanding their XP and rejecting their Vista, Microsoft has been forced to allow its OEM customers and custom builders to keep on selling XP well past the point that Redmond hoped we’d all be living in a Vista universe. Well it was not to be.
Businesses for starters have gotten tired of constantly upgrading OS’s every few years and with heavy investment is software see no real benefit to shaking up their operations and jumping ship for Vista. Neither do home users who are generally happy with XP and find the Vista generic promises unconvincing. Right now Microsoft needs to start looking past Vista, which has failed to become the transformative OS MS wanted it to be.