you should look at chromecasts for this purpose. You can control them with code, for example. https://github.com/Raven24/rbcast This also allows your team to easily cast to them when they need to override the default display
easily displaying many dashboards within your office is something that I haven't found any off the shelf solutions for. Our office has 20 tv's with chromecasts all displaying specific dashboards, but it took coding effort to get it to work.