In the past ten days, Scott Guthrie has started series of ASP.NET vNext articles where he shows some cool features that are coming in the ASP.NET vNext.
You can find the list of articles in the following link http://weblogs.asp.net/scottgu/archive/2011/08/31/asp-net-vnext-series.aspx
There are three articles available right now and as Scott has written, the post will be updated once new he writes new articles.
I read these articles and watched 2-3 short videos made about ASP.NET vNext. I 'smell' many new improvements in the ASP.NET WebForms model.