no, hes not referring to blueray. he is referring to dvd disks which have 2 recordable layers, (like most movie dvds have two layers).
The media is out already, it's just that 1 dual layer dvd costs about 7 - 8 $ usd. Perhaps this is way major brick and mortar computer stores dont carry it, expensive and unpopular. But you can easily find dual layer media in internet stores, but it's cheaper to buy 2 DVDs