It may make more sense to use an external Display ($100.00) than to waste your iPad's display acting as an external monitor.
Was thinking the same thing.
This product makes little sense to me.
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On the new Air's you can only have one external display, this makes an easy and cheap way to add a tertiary monitor if you already own an iPad.
Also with the Air you have an awesome portable dual screen setup.
With little added value. An ipad as a second monitor...come one its too small.