How crossmedia can you get? This goes already a long way… It takes place where you want, you have participatory elements, it combines different media forms/formats, it changes media, it uses different media techniques and in the end it is basically what we used to know as a music video.
Video killed the radiostar, but this is not a killer:
This interactive film by Chris Milk for Arcade Fire brings back to life a lot of media forms.
I could imagine some smart-phone stuff and a bit of augmented reality in there, but I guess that will be along in the next one… 
Right now it is cool enough as it is.
Well, this is it: http://www.thewildernessdowntown.com
Beware: Do not try this on an old browser and/or old computer!
I really like it.
How about you?
Tags: Arcade Fire, augmented reality, Chris Milk, cross-media, crossmedia, digital revolution, distribution platform, innovation, interactive film, location based media