Although the movie starts out portraying the traditional Elizabethan style of acting on the stage (ie, stylized non-realistic acting), by the end of the movie, sequences on the stage are being performed in the style of realism (ie, what most people think of as modern acting), which was a style of acting not introduced until the 20th century.
The full title of the stage play behind this movie is Compleat Female Stage Beauty, which was reportedly the advertising poster slogan for Kynaston's female impersonations.