I was in Marks and Sparks the other day and every department had an iPad. We were looking for a Gilet (jacket) for my daughter and the assistant got the iPad and checked up for one on there.
They seem like a luxury to me rather than a necessity They seem to have some good uses as you indicated.
I can, I hardly ever use mine. PAYG and only use it and carry it at the request of my good lady who likes to keep tabs on me