IKEA's Sonos-powered speakers are available now - Engadget
Neither has direct voice control. You'll need another device with Alexa or Google Assistant support to command them without an app. They still support the other features you'd expect from Sonos devices, though, including a wide range of music services, stereo speaker pairs and TruePlay tuning.
There's more to come in the future, as well. IKEA reiterated that you can expect a physical remote control and integration with its TRÅDFRI smart home app sometime in the fall. Don't be surprised if SYMFONISK's launch is just the start of a considerably larger audio ecosystem.