For the average consumer, integrating these subsystems so they work together -- and when, where and how you want them to work -- can be a challenge.
"You have all these different pieces coming in at all different angles into the home, but it's really difficult to tie it all together and make it one seamless application; and it's getting worse," said Jeff Janson, owner of Hook-It-Up in Charlotte, N.C.
"The average customer is being bombarded by all these cool little gadgets and it's difficult to make them all work together."
Janson's solution is to integrate those various subsystems into a home automation system.
With home automation, homeowners can control everything from the temperature and lighting levels in their homes, to their home theater components or their security systems.
The systems can be managed within the home, or offsite, all via a simple-to-use interface from their smartphone, computer or a remote control.
Kevin Renfroe with Centex Audio, Inc. in Round Rock, Texas, said he can set up a system that, "basically runs everything from audio and video to the drapes and lighting."
Renfroe said the most common requests he sees is to integrate home theater systems, so homeowners can, for example, have all of their music accessible from anywhere inside or outside the home.
"You don't need a music server sitting in the house anymore," Renfroe said. "You can go somewhere, have it with you and play it pretty much anywhere. You're not just stuck playing it at home anymore."
Added security might be the biggest benefit of automation systems. Through remote access, you can check if you've set your security alarm.
You can turn on exterior lights if you're away from home overnight, or are driving home late and don't want to pull into a dark driveway.
The systems are only limited by how they are programmed.
"Once the programming is done, it can be transferred to any device, like an iPhone or iPad, and they can use that device to (control all of those components)," Janson said.
Both Janson and Renfroe said that they can get homeowners into a basic automation system for about $1,500.
Because most of the technology relies on software programming, systems can be updated to account for changes in technology.
More and more companies are offering it as a service, including home security, TV, Internet and phone service providers, so it's important consumers shop around for a qualified installer who has a good history and stands behind his or her work.
Check that the company is insured, in the event someone is injured or damage is done to your home.
"I've had customers that have been burned before (by another company) because someone put their foot through the attic or put holes in the walls and didn't repair them," Renfroe said.
"Ask to see a copy of (the insurance policy). Get multiple quotes and ask questions about the quote.
"Is the quote itemized? Do you know what you're getting? If you get a one-line quote with just a total, you may want to move on. You don't know what you're going to get."
Angie Hicks is the founder of Angie's List, the nation's most trusted resource for local consumer reviews on everything from home repair to health care (www.angieslist.com).
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