All those pledges to remember, next time you check into a hotel, whether you like a soft pillow or a hard one: they have an impact.

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They can also be used for different functions as users can watch a video on one screen and input commands on the other, or check email on one screen and use the other as a soft keyboard.

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But I spend a lot of time at airline check-in counters, and the vast majority of bags I see are of the soft-sided variety, which I have used more times than I can remember.

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