This document summarizes some of the new features in ASP.NET MVC 4, including bundling and minification support to improve page loading performance, database migrations to evolve database schemas in a code-focused way, adaptive rendering and display modes for mobile web development, support for building and hosting web APIs, and asynchronous support to improve server scalability. It provides demos of bundling/minification, database migrations, mobile web, and hosting web APIs. It also discusses improvements to Razor and conditional attributes in MVC 4.