Is Microsoft finally admitting that Windows Vista is a lost cause? Well, that’s certainly not the official company line, but it does kind of seem that way to me. The embattled OS’s successor, Windows 7, wraps up a public beta in a few days and speculation is that Microsoft is planning to crown its heir to the Windows kingdom as early as the Fall. By then, Vista will have been on store shelves for less than three years. That’s not a very long time compared to XP, which was top dog for five years before being replaced by Vista—if it was ever really replaced at all.