What do you mean stores? What stores? It's entirely their decision. All they need to do is accept it. Simple as. It's completely their choice not to do so but the fact that they don't is scandalous. I like coindesk just to clarify but my opinion really changed about them with this fact.
If I remember correctly, CoinDesk doesn't sell the services or products listed on their deals website. All of the items/services are outsourced from different sources. CoinDesk would obviously want to accept bitcoin,it's just that the companies they have negotiated with are still working on it.