Earlier quoted context omitted.
I wonder, why go this route instead of creating a device to add to your TV? My echo is right next to the TV.
Because this way the screen can turn on and off dynamically. Also, it doesn't tie you to having to have a TV in a location you want one.
As for not being tied to where you have a TV, for $200 you can buy a 40"+ 1080p TV, for $100 you can have a really nice IPS 22" 1080p monitor. Probably better than this tiny thing.