Elgan: This year's mobile screens will stun and amaze

How phone and tablet makers will dazzle you with displays

It seems like all phones and all tablets do all things for all people these days. Every single smartphone and touch tablet has become just about everything anyone could ever want in a mobile device. They're computers, alarm clocks, music players, TV sets, libraries, game arcades, calendars, appointment books, cameras, Internet appliances, TV remotes and more.

With every mobile product able to do everything, how do new gadgets stand apart from the crowd?

This year, the answer is becoming clear: Display design and technology that will absolutely blow your mind.

The iPad HD

Rumors and circumstantial evidence suggest that the upcoming iPad, which Apple is expected to announce on Wednesday, will have twice the screen resolution as the current iPad.

Remember that twice the resolution means four times the pixels. The iPad 2 has a 1024-by-768-pixel screen resolution, which adds up to 132 pixels per inch (ppi). Although the screen is expected to be the same size, just one quarter of a double-resolution 2048x1536 screen (264 ppi) will contain the same number of pixels as the entire iPad 2 screen. The new iPad screen will probably look as good as a glossy print magazine.

This week, circumstantial evidence emerged that the name of this new tablet will be the "iPad HD," as in "high definition." The name showed up in a Griffin accessories catalog that refers to the upcoming sale of an "IntelliCase for iPad HD." It also shows up in an app that keeps track of makes and models of mobile devices.

Adding "HD" to the name makes perfect sense. It would line up with rumors about the addition of both a high-quality HD camera -- probably the same excellent camera as the one in the iPhone 4s -- and the high-resolution display.

It's also possible that the iPad HD will have a front-facing camera for HD FaceTime video chat.

It appears that Apple intends to focus attention on screen quality as the key feature that separates the iPad from the pack.

Samsung Galaxy B

Consumers want both the smallest phone possible, and also the largest screen possible. Obviously, these mutually exclusive qualities create a challenge for the industry.

With each new generation of phone, the bezel, or the nonscreen hardware that surrounds the screen, gets smaller as engineers and designers find new ways to get the screen as big as possible while keeping the phone as small as possible.

A new phone coming out of South Korea this year from Samsung called the Galaxy B may have finally reached the promised land: A phone with no bezel.

Reports say that the screen reaches all the way to the edge of the device on both sides and at the bottom. At the top of the device, there will be a dark strip between the screen and the edge; that space will hold a camera and a speaker for making calls.

Asus PadFone

When most smartphone users need a bigger screen than the tiny one on their phones, they turn to other devices like tablets and laptops. But that can be problematic for three reasons: First, the phone app they want to use may not exist on the larger device. Second, it's expensive to buy extra devices. And third, moving your data around can be tricky.

Later this year, Asus will introduce a product called the PadFone. The device will run the Ice Cream Sandwich version of Google's Android, and it will feature the kind of powerful processing, graphics and camera specs you'd expect on a high-end smart phone.

But it will also do a neat trick: It will be possible to insert the PadFone into an optional tablet-like accessory, thereby turning it into something about the size of an iPad. With that accessory, the phone transforms into a touch or pen tablet powered by the phone.

Mobile World Congress 2012 revealed many emerging trends for smartphones. Which will be the most significant?

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