There are existing
tracking systems involving several stationary devices set up arround the
stage and a device worn by the performer - these require significant configuration and are expensive.
Soloshot sounds like interesting tech requiring just one stationary device and a device worn by the performer; and based on the target market, configuration is probably fairly easy. However, the FAQ says that it does not work indoors due to some of the technologies involved. My guess is that technology limiting to outdoor use is likely RF direction finding and/or GPS
tracking; but that's just speculation. It sounds to me like getting this working indoors would be an important techological hurdle to overcome before adapting for entertainment lighting would be feasable.