Doodling seems to be the big feature in this new update. Streamers on the Twitter-owned app can now tap and hold while broadcasting to select a Sketch option. The option allows for three primary colors or a dropper tool to pick colors from the actual stream. Other than drawing fun things on one's stream, to tool can be used for practical use, i.e. drawing a circle around the main focus on-screen.
For folks who like to see how many viewers have watch their streams over time, Periscope has added a section were streamers can view charts and statistics for all broadcasts.
Periscope's latest update can be found in the iTunes App Store for free.