Reading vs. Laptopping

Susan and I were speculating: How is a person sitting in a chair at the library reading a book different from a person sitting in a chair at the library working on a laptop?

• In general, the level of concentration of the person on the laptop is greater.
• The person on the laptop would probably not be in the library if the library didn't offer Wifi.
• Others?

A room full of laptops (like the upstairs this morning) has the quiet and intensity I associate in my mind with a reading room of a hundred years ago. All that was missing was someone saying, "Shhhh!"