Between the minuscule face and the fact that winding A) is overly complex, and B) keeps time for less than two days, this seems like more of an expensive toy than a practical timepiece. As an engineering feat, it is admittedly impressive... but impressive and useful are not synonyms.
In my opinion mechanical timepieces are novelties in the modern era, so I don't think the practicality of a mechanical watch is very important. If you want practicality, a quartz watch will run continuously without intervention far longer than a mechanical one and will keep better time. Better yet, a smartwatch can tell you more than just the time! If you want to make a statement or own a neat piece of engineering though, mechanical watches are the way to go.
Again this is my opinion, but I don't see any reason to be worrying about the practicality of something like this.