The Mobile World Congress (MWC) 2020 has been canceled after health concerns in the wake of the coronavirus. The GSM Association (GSMA) who organizes the show, decided to cancel the whole event after a lot of companies including Sony, LG and HMD Global, pulled out of the show.
As explained on 9to5Google, "Ambient Mode is a “proactive” Google Assistant experience that is available whenever the device is being charged. You can access proactive information and suggestions on weather, agenda, entertainment, reminders, and more. The feature can also be used to turn a phone into a digital photo frame or as the interface to control smart home devices, such as lights, or music players." OnePlus announced that the proactive Google Assistant experience will soon be available on its phones.