We don't have any official LG press release information but just yesterday, two articles surfaced online about Samsung and LG battling it out with their TV operating systems. Samsung with Tizen 4.0 and LG with webOS 4.0. Not sure if this just stems from overzealous writers, but CES is just around the corner on January 9th - 12th, and that is where LG usually announces something. If you recall, this is where we learned about upcoming webOS releases. So is webOS 4.0 coming out? if you read these articles, you would thinks so..
http://english.etnews.com/20171226200003
http://www.avcesar.com/actu/id-23537/ces-18-smart-tv-samsung-tizen-40-et-lg-webos-40-objectif-smart-home.html
Keep an eye out for leaked information ahead of CES. We don't know for sure at this point, and we can only assume webOS 4.0 is coming.