I always find these cool, and then remember that I know someone who built a working (well working!) prototype of this in a weekend no almost no fanfare, from practically scratch.
These are students, young/new engineers. This is impressive and should be lauded as should all attempts to push what an individual person is capable of. It may not be new or novel to everyone, but it is to them...basically, cut them a bit of slack.
This was 2-3 years ago, so machine learning wasn't advanced (and even now, getting a functional NN running and trained in a weekend isn't feasible) so they only had it recognize a small set of commands, but it could do that.