New major version of Liferay Screens, including tons of new improvements and new features. Some of the more important ones are:

[LSR-860] - New Asset Display Screenlet, a new screenlet that renders audio, video, files, images, DDLRecords... just passing an asset entry id or linking it with an asset list screenlet. It does not need to know the type of the asset.
[LSR-859] - New Comments Screenlet, with support for listing comments, editing them and adding a new comment to all the asset types.
[LSR-861] - Gallery Screenlet, a screenlet that renders a dlfolder and shows all the images contained in several ways: a slideshow, a list, a grid... and lets you upload new pictures directly from your gallery or capture a new one with the camera.
[LSR-858] - New Ratings Screenlet: with support for displaying, adding and updating ratings.

And specific to some platforms:

Android

New architecture for creating screenlets, with a synchronous interactor layer and less classes to implement :D
[LSR-698] - Cookie based login, now you can create a session based on the Liferay instance cookie and access all the resources (files, pages...) you have access without having to use the JSONWS remote services.

iOS

[LSR-873] - New progress presenters architecture, offering a simple way for creating new progress dialogs.