What to know

• Robert Downey Jr., whose famous portrayal of Marvel’s Iron Man had him decked out with a variety of high-tech gadgetry,S1
• Robert Downey Jr., whose famous portrayal of Marvel’s Iron Man had him decked out with a variety of high-tech gadgetry, is donning Snap’s Specs augmented-reality glasses in a new role as lead spokesman for the devices. Downey Jr.’s partnership with Specs kicke...S2