OptiSigns offers sophisticated yet simple ways to create beautiful content and manage your digital signage.
If you already have TV screens and/or looking for more flexible, solution with more apps supports. Amazon Fire TV is the best way to go.
$39.99 - Fire Stick HD
$49.99 - Fire Stick 4K
$70 - Raspberry Pi Bundle
If you need enterprise, large scale deployment support. Devices can run 24/7 in industrial conditions. Highly customizable. ChromeOS with one of the commercial grade box is the solution.
$379 - AOpen ChromeBox Commercial 2