Billiards (not predicted): add latency simulation and improve explanation

Assets/Mirror/Examples/Billiards/MirrorBilliards.unity

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Assets/Mirror/Examples/Billiards/_Readme.txt

@@ -4,11 +4,15 @@ Mouse drag the white ball to apply force.
 Billiards is surprisingly easy to implement, which makes this a great demo for beginners!
 
 Hits are sent to the server with a [Command].
-There will always be some latency for the results to show.
+Server simulates physics and sends results back to the client.
 
-To solve this, there's another BilliardsPredicted demo which uses prediction & reconciliation.
+While simple, this approach has a major flaw: latency.
-This demo however is meant for complete beginners to learn Mirror!
+The NetworkManager has a LatencySimulation component to see this on your own computer.
+Client actions will always feel a bit delayed while waiting for the server.
+
+The solution to this is called Prediction, which we implemented in our BilliardsPredicted demo.
+See the Prediction article in our documentation!
 
 Notes:
 - Red/White ball Rigidbody CollisionMode needs to be ContinousDynamic to avoid white flying through red sometimes.
-  even 'Continous' is not enough, we need ContinousDynamic.
+  even 'Continuous' is not enough, we need ContinuousDynamic.