Samsung Galaxy S4 IV SMART Screen / Smart SCROLL usefull?

Check out how the Smart Scroll Feature works which is under the Smart Screen on the Samsung Galaxy S4 IV GT-i9505, GT-i9500\r
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Get S4 in the USA: \r
Get S4 in the UK: \r
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Sony XPERIA Z UNDERWATER Connectivity Tests:\r
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Beats Audio HTC ONE:\r
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Drawing / Sketch on Samsung Galaxy Note 2:\r
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Link to Playstation 3 Controller with Samsung Galaxy S3:\r
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Sony XPERIA Z Unboxing:\r
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