Marketing hype, mostly.

6.5 Creedmoor won't do anything hunting related that the 7mm-08 doesn't do just a little better. 7mm-08 carries more energy and drops less with hunting ammunition, regardless of yardage. .260 Remington is the equal of 6.5 CM with hunting ammo and at distances less than 400 yards.

With strictly target ammunition, loaded with special target bullets, it is marginally better than the 7mm-08 at distances greater than 800 yards.

If you are looking for light recoil hunting rifles for less than 400 yards, the .257 Roberts and .25-06 both recoil less and kill plenty good.