I think the most worrying appliance at the moment is this product being marketed under the name 'Sense'. It catalogues your sleep movements, if you have snored, what kind of light you need etc. It is linked to an app and tells you all you need to know about your sleep pattern.

A friend recommended it and I thought 'something I don't need right now is an app that accuses me of hogging the duvet or turning too often.' Or, more worryingly, cookies logged onto my browser with a charter to snoop' etc. Like WTF - go away and stop criticising how I sleep LOL