I hear that it's quite possible to jailbreak your kindle these days, and that sounds super cool.

But a lot of e-Readers tend to be quite expensive. Why would you purchase an e-Reader if you already have your phone? Even if you didn't, your average phone is still gonna be cheaper than an e-Reader. Depending on the phone you'll get, it's also more durable and portable, probably even waterproof. Phones also tend to have more storage than ereaders. They even come with color. (I know color e-Readers exist, but they're even MORE expensive, and they also come with their own issues that black-n-white e-Readers don't have.)

Yeah, eReaders have more battery life than phones, and they're also easier on the eyes. But overall, why buy an e-Reader to jailbreak if you already have a phone?