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I don't believe controls on screens like that are that far off in the future. Today we have bluetooth everything, I even have a blue toothbrush (can't believe I wrote that).
As a kid we were told that we'd never have computers for personnal use, now they're 20years old ! And personnal communications ? Cell phones and internetcoms have replaced trad phones in many a household.
If screens appear everywhere so should a certain "etiquette", just like with cells.
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