Interesting video though, showing the tech in action.
I think what would be better would be a blanket that shows when a customer is or isn't in REM sleep though, so crew know the best time to wake someone for a meal. As we all know, waking at the wrong time can leave you feeling tired and grumpy, and the right time feeling much better.
Trying to access your favourite Australian websites when overseas only to discover they have been geo-blocked? Concerned about your internet privacy especially when using unsecured wifi? NordVPN will solve both these common problems.