Anyone else intrigued by this?

There is a CostCo opening in Docklands (in around september supposedly) and I'm still unsure what it is. I know its a big US chain. I know they sell everything in bulk for less. So its really going to be helpful during the food price explosion. BUT is it available for retail OR is it only available to Business? I am not from the US, have never been to a CostCo so I have no idea what to expect. I mean if I can save a heap I'll be sure to do a big shop with a few families and split it all, but if its just for business how is that going to help the retailers?