Going to be hard to dethrone the 243 Win.
That's how I see it too.
The 243 Win has been an overwhelming success on it's own merit. I count it among other American Classics, such as the 22-250, 270, and 30-06.
A few rifle loons will recognize the technical advantages of the Creed case, but not the masses.
I watched Pat making empties with his 6 Creed at the Icebreaker this spring. Pretty cool in his AR10.