Who they're meant for (the few visiting journalists or the North Korean denizens themselves) is anyone's guess. I imagine the performers believe they are presenting the awe that is their nation.
And indeed they have. But is their intention to bewilder? The enormity of the production is staggering. But the truth behind the facade is a too monstrous to forget.
I wish I could link you to the original bit I saw but I'm beginning to watch the Vice expose found below.