From Somasegar’s blog…
In Visual Studio 2010, we’re going to expand Sharepoint support in two key areas. First, Visual Studio 2010 will deliver a broad set of project templates, designers, and deployment infrastructure that will make any .NET developer instantly more productive on the SharePoint platform. Second, we are exposing an extensibility API that will continue to foster the ecosystem of third party developers who create development tools and technologies.
Visual Studio 2010 will come with a broad set of project and items templates. You’ll be able to use these to quickly create or update SharePoint elements such as list definitions, list instances, site definitions, workflows, event receivers, Business Data Catalog models, and content types.
Get the entire post here: http://blogs.msdn.com/somasegar/archive/2009/02/19/sharepoint-tools-support-in-visual-studio.aspx