Ladies and gentlemen, I’m very proud and excited to announce the beta release of ExtJS 5 which comes with a lot of new features and improvements:

Tablet support and new themes

New Application Architecture: MVVM (standing for Model-View-ViewModel)

MVC improvements

Routing

Data Package Improvements

Model Validation Binding

Event System

Sencha Charts

Grids (easier to add new components to grids)

Widgets

Form Package Improvements

Dashboards

and much more… see the entire list with examples and documentation here: http://docs.sencha.com/extjs/5.0.0/whats_new/5.0/whats_new.html