The first is, will the light cones and the dialogue they are speaking match
locations on the stage?
Secondly, when a light cone is speaking how will it differ dramatically
from the other light cones that may be occupying the stage at the same
time?
A possible solution would be to have the light cones undulate while they
are engaged in dialogue by changing their intensity and/or color. This
will not only make them more identifiable to the audience but also more
engaging. A simular technique could also be used for the geometric shapes
shown on the web.
Lee