I went thru phases: paper only, then ebooks only when Kindles first came out, now I'm firmly in the camp of 'both'. I still love reading paper books too--it gives an 'experience' that's hard to describe--plus there's never an issue with screen resolution and battery life.

I've never found that having an ereader, in itself, caused me to read more if I hadn't already been a reader. But if getting a reader helps you to avoid distractions, makes the books more 'portable' so you will be able to read in more various settings, at nighttime, on the bus, etc., that's probably a good thing and makes it more likely you will read.