Cleveland - When it comes to low voltage the mantra used to be that if you can hard wire your home for audio, video and control then do it. That long held adage may not be true anymore.
Wireless technology has become so pervasive and robust that it often makes economic sense without sacrificing performance. It's really a sea change in thought and attitude for the custom integration industry.
There are still areas in which wiring is really important, such as video. There's just too much data being delivered in video, especially with ever-increasing resolution like 4K and beyond.
Look at audio though. Granted, if you're wanting to install in-ceiling or in-wall speakers throughout a new home then, by all means, hard wire from the amp to the speakers. And, yes, sometimes you'll need to put a volume control in-line. Otherwise, with Sonos, and the long list of competitors, wi-fi technology has made wiring for distributed audio unnecessary.
The same goes for lighting control. It used to be that to do sophisticated manipulation of lighting the structural wiring, meaning high voltage, had to be routed differently so that the control system could process and change lighting scenes. This adds up to more labor and wire expenses, not to mention more expensive equipment. Now we can simply swap out a standard light switch for a wireless one that "talks" to a control system who's program rests in your smart devices. That leads to less expensive programming charges and system changes that even the homeowner can make.
You'll still want to wire your home for security at this point. The sensitivity of alarm systems really does need hard wire to each door and window. Security cameras, on the other hand, only need power to run them since we now use wireless cameras which enable you to access them from anywhere in the world.
It all adds up to a simpler, streamline installation and a substantial savings to the home owner.