There are more examples where the BCI is used. This is in many cases the enthusiastic solution, mostly to control some drone, robot, car model. In other cases, this is an assistive device for people with impairment as wheelchair control or spelling machine. In the following text some representative cases are given.
In most cases there is hard to judge, if the system for the particular use case is really usable. Due to the major issues related to comfort, speed and reliability they are definitely not yet competitive alternative for healthy users. However, this can change quite soon as e.g. the signal acquisition tage could make lot of progress.