It occurred to me that it's possible to use the new Mvc 4 feature Display Mode (meant for switching views for mobile versions) as a complement for Feature Toggles.
Obviously this can only switch out an entire view (or partial view) but it can be a nice alternative to putting lots of @if(featureEnabled) {} tags through your view.
Add the following code to your global.asax Application_Start (or create an App_Start module).
DisplayModeProvider.Instance.Modes.Insert(0, new DefaultDisplayMode("{NameOfFeature}")
{
ContextCondition = (context => {true/false logic})
});
Then create 2 views - one for the feature being disabled and one for it being enabled - eg Index.cshtml and Index.{NameOfFeature}.cshtml.
This could also be used for similar concepts like permissions and a/b testing.
