As obviously stated in other threads... I've moved to Angular. Their 'digest all the changes and update the dom once' makes a lot of sense... and it has basically inverse opinion from Backbone. (Backbone has lots of opinion about data / saving, while Angular has more opinion about binding and logic.)
Backbone is an opinionated software, so it's hard to say if binding would be ever included.
For developers I suggest to try some of plugins, which are listed on GitHub wiki in the binding section and also take a look at Knockout/Ember/Angular so at least you would know what other frameworks offer.
https://github.com/marionettejs/backbone.marionette