The mention of a recipe for an AJAX grid is frightening though...like we are heading back into server-control world. Despite all the talk, MS never really bought into jQuery.
Also, I worry when the 2nd feature listed is that the default CSS/theme (which no one uses and is pretty ugly) supports mobile devices.
They mention deployment as a theme, but no feature to accompany it. It'll be interesting to see what they manage to do here. It's certainly a major pain point right now.
Of course, none of this addresses the primary issues with ASP.NET MVC: it's much, much, slower to develop in than Rails or Django.