what's new on Framework 4.5?

Hi everyone, previous month Microsoft landed their 4.5 version of .NET Framework.

Its has some differences, for example:

• Support for new HTML5 form types.
  


• Support for model binders in Web Forms. These let you bind data controls directly to data-access methods, and automatically convert user input to and from .NET Framework data types.
  


• Support for unobtrusive JavaScript in client-side validation scripts.
  Improved handling of client script through bundling and minification for improved page performance.
  


• Integrated encoding routines from the AntiXSS library (previously an external library) to protect from cross-site scripting attacks.
  


• Support for WebSockets protocol.
  


• Support for reading and writing HTTP requests and responses asynchronously.
  


• Support for asynchronous modules and handlers.
  


• Support for content distribution network (CDN) fallback in the ScriptManager control.

What do you think? change to 4.5 version?