Samsung's Ballie made waves at CES 2020 as a home robot concept that could one day roam your home. Last year, Samsung brought it back to the tech show to say that it was giving the device a projector that can stream information and content onto different surfaces.

In a packed Las Vegas arena, Nvidia founder Jensen Huang stood on stage and marveled over the crisp real-time computer graphics displayed on the screen behind him. He watched as a dark-haired woman walked through ornate gilded double doors and took in the rays of light that poured in through stained glass windows.