No more cables

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When do you think we can get rid of all the cables in our homes? WiFi are wroking really good now so no more cables involved with the web, but when can we get rid of the the of the cables? Wireless sound works well as well, my back speaks are wireless, but they still have to have cables for power :-( I don't want any cables in my house... When do you think that's possible? 5 yesrs? 10?