While 2009 is clearly a watershed year for e-readers with several product launches, the big wave of popularity for the fledgling market will be Q4 of 2010, according to a recent study.

The nascent e-reader market this year saw new devices from Amazon, with the DX and International versions of the Kindle 2, as well as from Sony, with the high-end 3G Daily Reader, along with Barnes & Noble's Nook. But wait, there's more: Spring Design, iRex Technologies, Plastic Logic and Asus have also unveiled details about e-readers coming to market.

With so many devices coming out with varying feature sets, digital book format support and price points, consumers will have more choice than ever and that should result in more e-reader sales this holiday season.

Still, 2010 is the year that the portable digital reading devices will finally see the beginning of mainstream adoption, "culminating in e-reader mania for the 2010 holiday season," according to Allen Weiner, research vice president at Gartner.

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