On facebooks Achilles heel: mobile.
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Graph Search shows that, for Facebook, mobile is still always 'tomorrow'
Facebook launched Graph Search as a beta product for many reasons: its gradual rollout to only US English users; its limitation to people, photos, places, and interests (posts and Open Graph actions still aren't included); an attempt to manage what could be outsized expectations from both users and Wall Street. But it's also because Graph Search isn't available on most of the devices people use to access Facebook, and it won't be anytime soon.
Graph Search isn't mobile, whether on the web or through any of the company's smartphone or tablet apps. This is a problem. It sharply limits the usefulness of Facebook's new search in almost all of the use cases presented on Tuesday. It cuts off access for Facebook's fastest growing and most...