Are in-app purchase costs supported by RequestProductPurchaseAsync?

I am adding in-app purchase support in my app. It states that there are two types of products in the app: durable and consumable. This is normal.

But here: http://msdn.microsoft.com/en-us/library/windowsphone/develop/hh967814.aspx we can read: ProductType attribute for ProductReceipt element: defines the product type. Only Durable is supported at this time.

Can anyone please explain what this means? O_o