There is a lot to unpick here, in terms of what these devices are designed to do, library content and how they related to libraries. This post is confined to a small bit of research I have done at this College, to find out more about student ownership of equipment.
136 owned a desktop or laptop computer
11 owned an iPad
13 owned Kindle
7 owned another mobile reader.
Interestingly, in relation to ebooks, 50 students said that they printed out what they wanted and read that.
A few weeks ago I thought I would take this further by asking new undergraduates what equipment they owned. Of 105 students, all owned at least one piece of equipment :
95 owned a laptop or desktop PC
16 owned a Kindle
6 owned an iPad
4 owned either a tablet, or a smartphone on which they would read an ebook
None owned a Sony or other e-reader.
If your library has carried out similar research I'd be grateful if you would comment and share your figures.