If the world ends, this will be our last iteration of Windows available to the public. Given that the world probably won’t end—and, by end, I of course infer “cease[s] to exist”—this will be a closer look into to the ever-changing future of “PC” technology.
Long story short, Ballmer refers to the next version of Windows and “Windows 8″ and says it will be released “next year.”
Ballmer: Next version of Windows due out next year | neowin.net