Do you regularly adjust your home environment depending on what you're doing?
To cut through all of it and figure out what's most relevant to you, imagine a typical day at home. Are there any devices you regularly turn on and off? Do you regularly adjust your home environment depending on what you're doing? Those regular habits and activities are typically the best candidates for automation. Figure out which ones are most important to you, and you'll have a much better idea of what to look for as you start shopping around.