Source : dotnetexpertguide
With release of ASP.NET MVC 4 Developer Preview, ASP.NET MVC team introduces a new default project template for MVC 4. New template has following improvements.
New MVC 4 project template has cosmetic improvements prior to MVC 3 project template. And it will help community to create good looking modern websites with the default template itself without investing more in template designing.
Along with cosmetic improvements, new MVC 4 template used technique called Adaptive Rendering which will help in proper rendering in desktop browser as well mobile browser also without making any changes. To see Adaptive Rendering in action, resize browser window to be smaller and accordingly MVC 4 template layout will be changed to fit with screen size.