E-book readership grows, but will e-reader device sales grow too?

Based on the Harris poll, the e-reader market is dominated by only three brands: Apple's iPad, Barnes & Noble's Nook and Amazon's Kindle.

E-reader use continues to grow, especially among adults between the ages of 18 and 47, according to a new report from market research firm Harris Interactive.

Out of all of the tablets and dedicated e-book readers on the market, based on the Harris Poll, the market is dominated by only three brands: Apple's iPad, Barnes & Noble's Nook and Amazon's Kindle.

The research does not break out individual stats about which devices within the Kindle and Nook brands are being used more for reading electronic books.

It could be argued that e-book readership has grown significantly in the last year or two because the prices on the dedicated e-reader devices have dropped to $99 and below, making them much more reasonable purchases for more consumers.

The Harris Poll also found that, quite unsurprisingly, owners of tablets and e-reader devices often buy and read more books in a year than someone who doesn't. Thus, digital book sales are inevitably going to rise.

But will the sales of e-reader devices continue to do as well? As the prices of tablets with more interactive features than just reading come down, more consumers might finding themselves willing to shell out a little more for a more comprehensive device.

Just look at the Nook Color, which includes games, interactive  books and Netflix access -- all for the prices of $169. The black and white Nook Simple Touch, by comparison, is $99.

This study also rises questions for publishers, especially those who might still be keen on print. While digital books haven't grabbed the interest (and wallets) of everyone, Harris Interactive researchers argued in the report that "it is becoming easier to imagine a world without as many printed books."

For reference, the survey is based upon the responses from 2,056 adults aged 18 and over in the United States surveyed online between February 6 and 13, 2012.