Are Facebook Pages the New Microsite?

Are microsites dead? With the proliferation of Facebook pages and the extension of Facebook to the public internet via the Open Graph API one would think so. I went to see the premier of Iron Man 2 the other night. Every single summer blockbuster that appeared in the previews had it's own Facebook page. Just a few years ago every movie promo had it's own microsite. Even Apple is getting in on the action.