The Internet giant also shows off "Expeditions" kits, letting teachers conduct virtual field trips, and its new "Jump" VR video recording system.
Two more wireless carriers announce pricing and availability for the marquee device.
Equipped with a Snapdragon 808 processor, a 16-megapixel camera, and a 5.5-inch quad-HD display that's brighter than ever, LG aims high with its latest G4 flagship.
A lesser-powered riff on the G4 recently appeared on a German retailer's website.
Another 5.2-inch One M9 variant could be in the works, according to details found on China's certification database.
Aimed initially at consumers in South Korea, the new phone will offer them a free screen replacement for the first year and a free 64GB memory card if they buy it by May 31.
The new screen represents a "quantum jump" in brightness, contrast ratio, touch functionality and other key features, according to LG.
LG is expected to reveal the new smartphone at events held simultaneously next month in New York, London, Paris, Seoul, Singapore and Istanbul.
Soon you'll don a high-tech headset as easily as you reach for your controller. Watch for blockbuster launches in the year ahead that pave the way to the brave new virtual world. Facebook and Valve lead the charge.
We know a lot about Cadillac's new CT6 model, including its driveline and some cabin tech features, but what it looks like will remain a mystery until its New York unveiling next week.