[Issue #1344] add a Retina display demonstration

pixels-retina/README.md

@@ -14,6 +14,12 @@ replay throughput, without compromising query performance or resource cost-effic
 significantly outperforming state-of-the-art lakehouses, Iceberg and Paimon, which provides minute-level data freshness
 and one order of magnitude lower data-change throughput.
 
+## Interactive Demo
+
+[Open the Pixels-Retina interactive demo](https://htmlpreview.github.io/?https://github.com/pixelsdb/pixels/blob/master/pixels-retina/retina.html).
+
+This demo shows Pixels-Retina in action.
+
 ## Components
 
 The components related to Retina are: