Currently implemented in the Well-Being and Indicators area of Community Accounts, Motion Charts allow for data to be displayed over time for a selection of variables. Individual geographies can be easily highlighted, circle sizes can be modified using any of the included variables and scales can be viewed as linear or logarithmic. By examining the movements in the chart we can see stories developing of the geographies included.
From Google's Analytics Blog:
What can Motion Charts add to my analysis?
The basic premise of Motion Charts is that it makes it easier to notice an important trend. Visualizing data [...] can help you to uncover insights and patterns that would be difficult to discover using traditional two dimensional charts.