Unity now supports registration by convention through the new RegisterTypes method.
Unity now supports resolving objects of type Lazy<T>.
Unity now includes support for ASP.NET MVC and ASP.NET Web API.
Unity now supports NetCore (Windows Store apps). (Note: Internally, the WinRT namespaces that support Unity in Windows Store apps (present in Unity 3.0 Preview) have been renamed to NetCore.)
The Unity assembly is now Security Transparent.
The bug that caused a first chance exception when registering a singleton is fixed.
The bug that resulted in static properties not being filtered out when doing property injection is fixed.