[3] Po Sein was particularly successful at introducing a variety of stage innovations, by explaining the changes to audience and interacting with them throughout the performance.

[4] His innovations led to a decline in the popularity of the marionette theater troupes, by breaking their monopoly on Jataka plays.

[6] He modernized the classical dance drama form, zat pwe (ဇာတ်ပွဲ), by adding variety acts, chorus lines, introducing admission.

[7] Po Sein is credited with introducing stockings and slippers as part of dancers' costumes; they had previously danced barefoot.

[4] He also introduced the modern costume worn by comedians (lupyet or lu shwin daw), which consists of a checkered Taungshay-style paso (sarong) and a loose jacket (previously, comedians had performed shirtless).