Foldable phones will surely be one next year's highlights for revolutionary tech. Most of the big names already scheduled showcasing events for their foldable phones. Samsung and LG would present their models at CES in January, while Chinese manufacturers like Huawei and, more recently, Oppo are expected to reveal their handsets at MWC 2019 in February.
https://www.notebookcheck.net/Oppo-to-showcase-its-foldable-phone-at-Mobile-World-Congress-in-February-2019.372441.0.html