You'll also find a number of Actions upgrades aimed at the smart home. A preview lets device makers run their smart home code locally on Google's Home speakers and Nest displays, helping gadgets both respond sooner and more reliably. Another preview will provide "full-screen experiences" that mix audiovisual and touch. Google's simple smart home setup is expanding to more partners, too.
Some of these improvements may take a while. While the smart display tech is available for building games today, the local smart home functionality won't be available to all developers until June. There are plenty of partners lined up, at least. Philips, LIFX, TP-Link and Wemo have already been testing the local device support, so there's a good chance that your lighting and other connected devices will respond that much quicker in the near future.