I have decided for version one, Windows 10 OS and the Latte Panda will be a good start. This is because EZ-Robot is native to windows platform and there are already API that I can use for windows for voice command / voice recognition.  This does not however exclude using the raspberry pi as I am still going to use these boards for other purposes like the video recording and pi cams as well. In this version of the AR HUD I will use two HD displays using HDMI, the panda ( and almost all other sbc) only has one hdmi output, so I will use the USB3.0 to emulate another one for the second screen.