I think that the house is symbolic of mankind's attempts to bring order to our lives through the use of technology. The house is full of tech. It's Bradbuy's vision of what homes of the future might look like. He's not far off either. Modern day smart homes can be voice controlled in a variety of ways. Robot vacuums exist. The Roombas are a popular choice. So popular that my family actually has two of them.
"The house was an altar with ten thousand attendants, big, small, servicing, attending, in choirs. But the gods had gone away, and the ritual of the religion continued senselessly, uselessly."
The above passage indicates that Bradbury sees our pursuit of technology to "better" our lives as a religion of sorts. The house is akin to a church. A place of worship. A location that is devoted to the worship of mankind and mankind's ingenuity.
The fact that all of humanity is absent in the story is important to note. It shows that Bradbury believes that all of our creative endeavors to improve and protect ourselves can't possibly accomplish it. They will outlast us for one reason or another. It really is a pessimistic outlook on mankind's ability to survive.