Update top-level README

Author: calren

README.md

@@ -1,6 +1,20 @@
 # ML Kit Samples
 
-A collection of quickstart samples demonstrating the [ML Kit](https://developers.google.com/ml-kit) APIs on Android and iOS.
+A collection of quickstart samples demonstrating the [ML Kit](https://developers.google.com/ml-kit) APIs on Android and iOS.  
+
+ML Kit brings Google’s machine learning expertise to mobile developers in a powerful and easy-to-use package. Make your iOS and Android apps more engaging, personalized, and helpful with solutions that are optimized to run on device.
+
+ML Kit currently supports the following APIs:
+- Barcode Scanning - Scan and process barcodes.
+- Face Detection - Detect faces and facial landmarks.
+- Image Labeling - Identify objects, locations, acxtivities, animal species, products, and more.
+- Object Detection and Tracking - Localize and track in real time one or more objects in the live camera feed.
+- Text Recognition - Recognize and extract text from images.
+- Language ID - Determine the language of a string of text with only a few words.
+- On-device Translation - Translate text between 58 languages, entirely on device.
+- Smart Reply - Generate reply suggestions in text conversations
+
+<img src="android/material-showcase/screenshots/live_odt.gif" width="280"/> <img src="android/material-showcase/screenshots/live_barcode.gif" width="280"/> <img src="ios/showcase/translate-showcase/translate.gif" width="256"/> 
 
 
 ## How to make contributions?