As for #2- envision using snake arms to get around angles/corners and to be able to self retract- ie., like using your elbow and head to hold up car hood to free up your hands (sorry for bad analogy); in my world, i could envision it for a large fibroid uterus where i need to secure blood supply to uterine arteries an use arms to help retract a fibroid(pedunculated) or an ovarian cyst/mass in the way of my surgical field.
As for #3- I wouldn't think 2 sports would be useful especially when making a 2-2.5 cm incision for the port site- defeats cosmesis issues especially when placing incision in umbilicus to hide incision. Compare to da Vinci where we make 8mm incisions