unclear if this hand is fitted to the androids they had walking around at the event. I wish I didn't have to be skeptical at how much of the Optimus presentation is CGI but I guess having a product that's hard for people to believe is real is a good problem to have.
Disney Imagineering had that over a decade ago...You can see the robots designed for heavy constant use in action at the Rise of The Resistance (DL, DW), Tiana's Bayou (DW), Guardians of the Galaxy ride (CA, in the queue).