Among the most exciting proposed features slated for the next version are DOM manipulation APIs, which make it easy to access any elements in a web page. The company also plans to translate some server-side controls to be accessible via client-side calls. For example, a templating control could retrieve data from the server and place it into a page based on a local template without refreshing.
On the list of nice-to-haves, Microsoft includes animation and drag & drop. These popular features are a major part of effects libraries such as Scriptaculous, Moo and JQuery.
Developers attempting to use non-Microsoft tools have long had difficulty fitting in with the ASP.NET framework. For example, ASP.NET changes the ID of any server-manipulated page element. The DOM features alone in the proposed update to Microsoft’s Ajax tools will simplify client-side access.
If you want a peak at what the code will look like in the future version of ASP.NET Ajax, download the roadmap.