NOC Workers - How do you manage all of the displays/TV's?

We currently have 12 screens in our NOC, majority are Solarwinds NOC views but some are for our cloud environments.

We use a mix of Raspberry Pi 2's and 3's with Chromium pointing to the monitoring servers. The problem with the Pi's is that they can become very sluggish and don't seem to handle Java or Flash very well, so we're looking to build a dedicated NOC server to replace them.

The problem I'm faced with is how do I run 12+ HDMI/VGA cables to the TV's and connect them to the server?

Would you run Ethernet to the TV's instead and stream the displays over Ethernet?

Can any NOC people on here share how they have their monitoring screens attached to the network?

Thanks for reading!