There's a Podcast on AV Forums right now, bizarrely dated 19th Nov 1984 but I think that's in reference to an item on cassette tape, that talks about LG's attempt to join the multi-room speaker market.
The LG Music Flow product range includes three wireless speakers very similar in size to Sonos Play: 1, 3 and 5. There's a bridge product (R1 @ £49) to form a mesh network, but the speakers also work with Wi-Fi and Bluetooth* (*point to point only at this stage, I think). It's being priced head-on against the equivalent products from Samsung, and the speakers are priced at £20 less than the equivalent Sonos product.
There's a couple of interesting points; first, the speakers seem to support 24/192 so those with high def audio files might be catered for. But the second thing is what will interest people weighing up the Sonos Playbar...
LG's equivalent is priced at £499 and that includes a wireless sub. The soundbar has the same ability as Sonos to add the smaller speakers as rears too. The system is 4.1 rather than 5.1, and like Sonos it only supports DD in bitstream format. But there is HDMI in & out, a USB and a line input as well as the optical. Richers have a package deal of the soundbar, R1 mesh hub and a pair of the small wireless speakers for £600.