Yes, the resolution is fine for all of that.
I just finished a 4 day conference (NASAGA - North American Simulations and Games Association) during which I generally kept my iLiad on for 10-11 hours at a time, taking notes frequently. No problems-- and I got a lot
of interested looks, and many people came up to me between sessions and asked to try it! Some were put off by the fact that it doesn't have on-board HWR, but most still saw it as an extremely interesting and useful device. And they were also envious of the fact that I have a couple of thousand books loaded. I think iRex may be about to sell a bunch more units.