Add visualization element explanation

examples/boltzmann_wealth_model_experimental/app.py

@@ -27,7 +27,11 @@ def agent_portrayal(agent):
 # Create initial model instance
 model1 = BoltzmannWealthModel(50, 10, 10)
 
-# Create visualization elements
+# Create visualization elements. The visualization elements are solara components
+# that receive the model instance as a "prop" and display it in a certain way.
+# Under the hood these are just functions that receive the model instance.
+# You can also author your own visualization elements, they just have to return
+# a valid solara component or an ipywidget.
 SpaceGraph = make_space_matplotlib(agent_portrayal)
 GiniPlot = make_plot_measure("Gini")