Amazon’s patent application for voice-controlled light switch describes multiple mics on the faceplate and switch itself, so it can respond based on the position of the speaker (user) and whether the light is on or off.

Crestron patent application describes a smart bulb with an integrated on/off mechanism, so users can turn the lamp "off" locally but still control via app or home automation. Is it practical?

Introduced at Lightfair 2017 LG Electronics’ new ZigBee Connector plugs into an Android mobile device, discovers smart lights via visible light communication (VLC), and enables on-the-fly programming via LG's Sensor Connect app.

Security and home-automation giant Vivint Inc. files patent application for identifying guests through their “sound signatures” and running data through AI engine for predictive analytics.

Instead of unsightly keypads on door locks and security panels, Vivint proposes a method for projecting a laser image of controls and feedback onto a wall, door or other surface.

Lutron’s patent application describes lighting control and home automation over existing powerlines, no neutral wire required.