The term "Retro-Clone" keeps evolving

Dave recently talked a bit about the term retro-clone on his blog. I've started to notice something else interesting going on lately. It seems like people are now extending the term to include things like Palladium Fantasy, Rolemaster, Tunnels and Trolls, and other early fantasy games from the 80s. There are two interesting parts to this. One is that the term seems to be losing the temporal element it originally had, to include things that are "retro" by virtue of actually being old, not newly "created" to be retro. The second is that the "clone" element, even though it already had become blurred from it's original intent, is now seeming to encompass fantasy heartbreakers in general regardless of game system. Or in other words, any early fantasy RPG also that was created as a reaction to early D&D. There also seems to be an element of shift so that anything claiming to capture an "old-school feel" regardless of system (tweaked d20, or something pretty different), is being called a retro-clone.

Has anyone else noticed this? Where do you think this is going?