Advertisers will buy it because the seller can make the physical ad spot N times cheaper by showing N different ads during the day.
It's between glowing LCD panels and e-ink.
Advertisers are already cycling their ads on LCD panels at bus stops, on the subway, etc.
Going to e-ink just makes the advertisement much dimmer, it can't handle video, and it becomes washed out. Why would avertisers ever prefer that?
Advertisers will buy it because the seller can make the physical ad spot N times cheaper by showing N different ads during the day.