In a discussion on the Arduino.cc development group Massimo Banzi has confirmed that Arduino LLC has discontinued the production of Arduino Due/Genuino Due boards, although they “see an interest for the Due from the resellers”. Arduino Due and compatible boards will still be supported in Arduino IDE.
By the first looks the Arduino Due is far from having the success of the Uno. Why? Perhaps the maker community is not ready to switch to 3.3V logic, as there number of 3.3V shields can be counted on the fingers of one hand. Besides this, both Arduino and the rest of shield manufacturers are not trying to push to 3.3V logic: although from UNO R3 and recent boards come with an ioref pin that is supposed to help choosing between 5V and 3.3V logic, to my knowledge there are no shields that use this feature.
Add to this some software issues, like the bad implemented I2C library, and it looks that the Due has no foreseeable future. Too bad, it was a promising product.