On May the 4th Microsoft announced a new development framework for SharePoint, based on pure client side technologies. This framework would be utilising a combination of Node.js, Gulp, TypeScript, React and Knockout. It marked a radical change to the way we develop apps using established open source frameworks for pure client side with SharePoint office 365 and eventually SharePoint 2016.
Yesterday (18th August) Microsoft announced the release of SharePoint framework in Preview: See announcement: SharePoint Framework Developer Preview Release. So we are going to create a new app with this framework.