I can't see this but maybe for hogs down south.
In the Northeast, walking around with a rifle dangling around like that, other than being really annoying, would serve no purpose. There's just nothing to stalk, maybe rabbits, that you walk up on and need a super uber fast grab and shoot on with a rifle. It really would be very annoying. Hogs I can see, but then I want my rifle in two hands ready to mount and shoot.
Well,maybe it's just me.
Anyway, all power to new stuff.