This question has been at the center of many recent discussions. Personally, I think it can be used in a pinch, but I don’t think priests should use it regularly.
Catherine Panzica at the USCCB Media Blog offers her take, which includes this great point:
“(W)e treat objects admitted for liturgical use with respect and understand that once given over to liturgical use, they are used solely for that purpose. To use an iPad, for example, in place of a printed Missal, what happens after its use in the Mass? Is that same iPad later used to check e-mail, browse the Internet, play games, or watch streaming video?”
What do you think?