Comment by Larrikin
He asked for more concrete examples because the professional companies are behind the consumer level products. Home Assistant is one of the biggest projects on GitHub for a reason. It's still stuck in the hobby space but everything they are doing lately is to push it past Apple Home for the regular user.
Are you confused about what early 2000s means?
The ideal integrated smart home was already achieved before smartphones existed.
Recent advancements have mostly been about pushing the original 100 million+ usd cost lower.