Interesting... star trackers have been around since the 50s and inertial navigation / SLAM is pretty plug and play these days. Looks like the unique thing they are going after is spoofing GPS so that a consumer drone can fly in a GPS denied environ. Neat, but a bit dubious as an investment.
The problem with star trackers is that it's getting harder and harder to see the stars
It is open-source so it can be used by both sides to kill each other, or to assassinate a well-protected political figure, or to inflict damage on a crowd.