Those are just older catalog examples you cited from the article. The article include newer ones like "I am Legend". If the retailers consider it as a repricing, then the impact would be across the board.... though newer ones would be discounted less (Still... Yay !).
I bought I am legend for $10 on DVD about a month ago. Blu-ray needs to be much closer to DVD prices across the catalog if they want that kind of mass acceptance.