It seems pretty nifty.

I played around with Tobii eye-tracking hardware half a decade ago and was pretty amazed by its precision. I understand now it also has Glasses (vs. the model I tried, a tracker you put below your monitor usually). Marrying eye-tracking glasses with this mouthpad might be a winning combination: eye-tracking being the mouse to navigate in xy-space, and mouthpad for clicks.

Kudos to this group for putting out a finished product though, can't wait to see it used and iterated more out in the field.