I agree with you that the 6.8 Rem will not beat the ballistics of the old 6.5 Swede. But what is exciting about it is:
1. It is a short action round, that will make for great short action hunting carbines in .27 caliber, that will give you a meaningful step up from the .243 Winchester, without resulting in more muzzle blast or recoil. An accurate, short, .257 Roberts type round, in factory loaded 120 grain.
2. Just my opinion: It solves the current 5.56 military round problem!
3. I also think this will make a real nice single shot rifle round.
Just my opinions only.
Big Paulie