This is pretty cool stuff. However, a problem with this approach is that it ignores the cerebellum. One of the reasons a road-side sobriety tests works is that

This is pretty cool stuff. However, a problem with this approach is that it ignores the cerebellum. One of the reasons a road-side sobriety tests works is that the cerebellum is very susceptible to alcohol. When the cerebellum is not working well, you get clumsy. This approach on a large scale would likely result in that type of clumsiness.