Although Microsoft's new Surface phone won't be available for a year, the company's commitment to the dual-screen Android device -- nope, it's not a Windows phone -- comes at a time when interest in ultralarge screen phones is on the rise.

Microsoft claims that it's building a brand-new category of devices, but that isn't exactly true.

While this will be the first dual-screen phone that supports a digital pen -- the Surface Pen -- the Duo is far from the first of its kind.

LG's G8X with Dual Screen, for example, offers a similar dual-screen solution with the aid of a case.

But the doomed history of dual-screen phones stretches all the way back to 2011, when Samsung, LG and Kyocera all attempted to expand their phone screens' real estate with a second display.

Will Microsoft be able to make a second screen cool?

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