When processing giant AMD bought ATI a few years back, it kept the old name around, but with a new line of chips on the way that combine the duties of both a processor and a graphics card, the company feels that keeping both the ATI and AMD brands around would just confuse people.
So ATI is gone. The name "Radeon" will stick around, but with the future of processing lying with these "hybrid" chips, even that will soon carry less clout. For graphics card fanboys, then, it's a case of the times, they are a'changin.
AMD to dump ATI brand [The Register]