Visual Studio 2010 ships with new SharePoint Developer Tools that simplify the process of developing solutions for the SharePoint platform. Using nothing more than the standard functionality provided with the tools you can rapidly create custom solution by focusing on the real work instead of the plumbing. There are however things that you still have to do by hand.
The first difference that I saw, was the installation size. In Beta 2 my configuration was around 3.7GB, in RC it increased to 4.2GB! Still, the Release Candidate makes it worth every MB, because it’s lightning fast! The Add reference window is “just there” and the whole IDE just feels very very responsive: great work VS team!
Delivering a great User Experience for a custom application developed on the SharePoint application is really easy using the new SharePoint 2010 UI API. One of the new possibilities is to leverage the Notification Area to communicate the progress of an operation to the users to make using your applications more intuitive and responsive.
SharePoint 2010 ships with a brand new framework for delivering compelling user experiences for custom applications created using the SharePoint platform. One of the pieces of the UI framework is the Status bar which can be used to display persistent messages to the users.