In 2016, Asus introduced P3B projector:
800 lumen (500 lumen on battery lasting 3 h), LED lamp, 154x131x43 mm (0.9 l), 750 g (1.65 lb), 1280x800 DLP, HDMI in.
8 years later, with P3B discontinued, where is a projector as small (under 1 l), as lightweight (under 800 g), battery operated (or at least PD powered and lighter) and at least as bright with 1080p resolution?