Oh, I guess I'm just dreading the thought of some marketing knot-head at Sony getting starry-eyed at the prospect of making Gran Turismo 5 require a new DF Pro with a clutch. I don't doubt that at some point, Logitec will make a three pedal attachment, or possibly a full fledged full sized sterring controller with a configurable shifter with different plates, but I can't see such a prestige controller costing less than $299 at launch. And... you know, not many of us can just go blow that kind of money on an accessory.
Someday, yes, just not for a good while. My DF Pro is just dandy, and I'm not a drifting fiend.