I first thought, it's not April 1st!
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.
[video=youtube;9oF0-28MOoU]https://www.youtube.com/watch?v=9oF0-28MOoU[/video]