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Telly starts shipping its free ad-supported 55-inch TVs
(www.theverge.com)
This is a most excellent place for technology news and articles.
what prevents people from covering up the advertisements screen?
camera that watches you drink the verification can
I would expect them to include cameras that would check that you are looking at the tv and see the ads reflected in your eyes before it lets you play non-ad content.
The settings menus (input switcher, etc) will be on it. Also it will collect data on anything you view using the main screen (HDMI input, etc) regardless.
Big Brother.
Black Mirror.
Something as simple as a light sensor would stop that.