Primarily, reading. Very easy to keep the Liturgy of the Hours on the thing, which I have to daily. In general, tablets are good for content consumption. As for production, if you go any bigger, meh… just use a computer.
Discussion
I should share that with my Spiritual Director, he was just sharing a gripe about how the Kindle Ereader manages backlinks which of course are super important for LOTH. Agreed with the subsequent point.