I was finding a bit odd that one singe Arduino would have the ability to run two software packages. Silly me. Now it makes sense. A third (or more) Arduino(s) will be necessary only if you plan to re-transmit the signal from the base RX to additional displays.
I have no particular interest on this myself, but I guess taken a bit further this architecture could open new even more complex possibilities for owners. Such has monitoring temperature/humidity (perhaps CO2) on different rooms and returning the data to the base unit. But that would perhaps imply coupling the RX unit with a more robust Arduino model or ideally to a Pi, so as to skip the need for a third computing machine...
I have no particular interest on this myself, but I guess taken a bit further this architecture could open new even more complex possibilities for owners. Such has monitoring temperature/humidity (perhaps CO2) on different rooms and returning the data to the base unit. But that would perhaps imply coupling the RX unit with a more robust Arduino model or ideally to a Pi, so as to skip the need for a third computing machine...