If you're curious about some of the ideas that could come up in future versions of ASP NET MVC, then check this page. You will find examples of ideas such as:
- dynamic view pages.
- New ActionResults like AtomFeedActionResult.
- HTML helpers such as HTML.Button() and HTML.SubmitButton() (Finally :)
There is a ton of information available on that page, well worth a look.
Remember, there is a roadmap page for ASP NET MVC 4 which illustrates what the team are officially planning for the next release. If you would like to suggest a feature/improvement, then visit the ASP NET user voice page.