After four years of playtime, the three major game consoles are all due for a revival. Microsoft beat its rivals off the starting line with the unveiling of its Xbox 360 Thursday. And the new system already has the buzz factor working in its favor. In the week leading up to the 360's release, fans scrambled to get photos leaked to the Web. But does Microsoft's headstart mean the Xbox can compete with next-generation consoles from Sony and Nintendo?