A number of our partner teams have been working on both the foundation for browser-based ML & on cool models that can run there efficiently:

We are excited to announce the release of BodyPix, an open-source machine learning model which allows for person and body-part segmentation in the browser with TensorFlow.js. With default settings, it estimates and renders person and body-part segmentation at 25 fps on a 2018 15-inch MacBook Pro, and 21 fps on an iPhone X. […]

This might all make more sense if you try a live demo here.

Check out this post for more details.