To be honest, I don’t think they’re very good for “displaying” text information, when that includes anything you want to read closely and interact with, either. I underline and scribble marginal notes all over everything I read seriously, and current electronic devices don’t come close to keeping up.

It’s really tragic, because it seems like with the proper software a device like the iPad (esp. one also supporting pen input, but even just with finger touch) would be really great for reading, and for marking up/hyperlinking/etc.