GPD MicroPC looks tempting indeed...
1) Why only one touch-pad? What will left-handed people do?
2) HDMI details: is it in, out or either way? Is it possible to use one of the USB ports (full-size or USB-C) as a second video-port (for those people who want to attach VR/AR headset to HDMI port, and yet be able to output the image from screen to the projector)? And I personally dislike HDMI - prefer old-fashioned ports, such as VGA and others.
3) active cooling design is not a plus in my book. Imagine standing in desert, with ambient air temperature of 50°C, and insolation over 1kW/m². With computer running something heavy, would it overheat to extent of burning human's hands and melting plastic enclosure?

Thank you. Best wishes.
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Per aspera ad astra...