On the technical side, this is a perfect example of how AI can be used effectively, and is a (very obvious in hindsight) application of the cutting edge in scene understanding and HCI. There are quite a few recent and advanced techniques rolled into one product here, and although I haven't tried it out yet it seems fairly polished from the video. A whitepaper of how this works from the technical side would be fascinating, because even though I'm familiar with the relevant papers it's a long jump between the papers and this product.
On the social side, I think this is a commendable effort, and a fairly low hanging fruit to demonstrate the positive power of new ML techniques. On a site where every other AI article is full of comments (somewhat rightfully) despairing about the negative social aspects of AI and the associated large scale data collection, we should be excited about a tool that exists to improve lives most of us don't even realize need improving. This is the kind of thing I hope can inspire more developers to take the reins on beneficial AI applications.