What do we need to learn to use Tapestry 5.4 ?

As far as I understand. T5.4 will have a major refactor for the client side
related code. And I've passed by many Javascript libraries names like
Backbone, Coffescript and others.

So to summerize, what new stuff will we, tapestry users, need to learn to
use T5.4 ?

*---------------------*
*Muhammad Gelbana*
Java Software Engineer