Visual Studio 2010 Ultimate provides tools to help developers work more efficiently with legacy code, manage database changes alongside code, perform architectural modeling and validation, spend less time debugging through features like IntelliTrace, improve testing practices, and enhance team collaboration. Key capabilities include dependency diagrams, gated check-ins, code analysis, database schema and data comparison tools, architectural exploration, test impact analysis, coded UI tests, test and lab management, virtual test environments, and web load testing.