First, let me say I am NO Apple fan boy. That said, the iPad is a very useful tool for many things. It is NOT good for everything, or a replacement for a computer. Check out the Presonus StudioLive series of digital mixers, and the iPad remote mixing app and the iPhone monitor apps (studiolive remote and qmix). My first hand experience is that it is an awesome system that does what other systems that cost tens of thousands of dollars more do. There are you tube videos that show how it works.
Yes, you nail one of it’s useful features. I think it would also be a great tool for home use using Wi-fi. It would be a great cookbook in the kitchen, complete with internet access. In that way, it very much reminds me of the flat screens used on the Jupiter mission in 2001, A Space Odyssey.