This looks nice (and it's great the LI is open sourcing it) but it doesn't seem like a great alternative to the tab bar. With the tab bar you select a tab and get instant feedback above it. If you don't like what you see you can select the next tab. Two touches. With this you have to select, dismiss, and then select the next menu item. Not really a great solution for moving through information quickly especially as you have to give a second for the view present/dismiss animations - unlike tab bar.