wouldn't that depend on install automation, configuration and what the sitter wants to do?

are all the installs a TV? don't you sometimes add controls for lights, drapes, music....

but the point was not about how many devices or what they do. IMHO every room that has a display needs its own controller be it OEM, universal remote/controller or touchscreen. It just sounded weird that he talked about handing your phone to someone else to control the equipment and then worrying about what they might see on the phone.