I have an ubuntu 14.04 box, Roku 3 and 50 inch TV and I want to cast my pc screen to the TV. The roku and pc are on the same network. Has anyone got a way to do this? Doesn't have to be a nice solution, just wondering if it's possible.
Check out MiracleCast.
This might be what you're looking for. It projects your screen onto TV's using Miracast over WiFi.