I'm disappointed with the Arduino Tre specs. Why put in an 8-bit microcontroller (Atmel ATmega32u4) with only 10-bit ADC resolution when you have a SAM3X chip that you already worked with? I'll just stick with the Arduino Due for now.
If I'm able to program the Due using the Tre as a standalone computer, I may reconsider the Tre.
The Arduino Tre developer board was available for a very short time - the developer boards cost $212+. There were only 50 boards made. I'll stick with my Uno, Dues, Megas and Nanos for now. Then a Zero in the future (depending).