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I predicted more than two years ago that dual-screen laptops would dominate the category within five years. Halfway to the deadline, Acer this week unveiled a workable and exciting two-screen laptop called the Acer Iconia.

The Iconia is the first clamshell dual-screen notebook that I'm aware of from a mainstream company. The laptop itself is the real deal. Powered by an Intel Core i5 processor and 4GB of DDR3 RAM, the Windows 7 Home Premium laptop supports the 3.0 versions of both Bluetooth and USB.

It's heavy at 6.2 pounds. And two screens drain the battery. Acer claims 3 hours of battery life. Worse, it's not replaceable, which may be the laptop single worst "feature."

What's great about the Iconia, however, is what Acer has done with the second screen. One screen is built into the lid where a laptop screen normally goes, and the other one is built into the base where the keyboard usually sits. Each screen measures 14 inches diagonally.

The screens operate together, with the top screen behaving like any other laptop screen, and the bottom doing special-purpose tasks, like providing a virtual keyboard or special-purpose dashboards.

In one mode, the bottom screen acts as a continuation of the top screen. For example, a Web page or a document spans from the top of the top screen to the bottom of the bottom screen. This mode appears automatically depending on the application.

Another mode brings up an application called the Social Jogger, which places a dashboard of activity several social networking sites on the bottom screen. Tapping on things brings opens them in the top screen.

The application Scrapbook provides a free-form multi-touch bottom-screen place to layout your pictures. By tapping on them, you can edit or send them using applications that open on the top screen.

Computerworld has the Editorial HERE!