Actually that's the problem they're creating for themselves. By maintaining the price, including their profit margin, they reduce their chance of sales meaning to DO have to eat their manufacturing cost already sunk into the production of their current inventory. Realistically they need to move it or they lose, but they're gambling instead people will buy them up re: of the forthcoming obsolescence.
I won't be surprised if the sales start going up the closer they get to the new edition, this may just be temporary to take advantage of "panicked buyers" who fear their chance to acquire the products.