I have a TV and AVR that both allow for control from a single remote using CEC. My current setup is Genie->AVR->TV. I can sort of control everything from the Genie remote except the AVR and TV are strictly IR so I have to point the remote at each to make them work. I had been getting around this by using an IR device that uses the CEC wire(s) in the HDMI cable. Unfortunately the connector is pretty fragile and it broke. Before replacing it I thought I would investigate CEC.
I think, with CEC, I can use the IR sensor in the TV to control everything from the TV remote, or maybe the AVR remote; I would have to play with it. The problem is whether or not I can also control the Genie. Pretty much all I do right now is turn the TV on and off and change the volume on the AVR. Everything else happens on the Genie. With CEC I could also use the AVR for CDs, DVDs, etc.
With the IR device broken, I point the remote at the TV to turn it and the Genie on. Then I have to point the remote at the AVR to control the volume. The problem is the AVR is actually over my left shoulder!