Duplex was one of the biggest demos of last year and now it's going beyond voice calls and taking care of tasks on the web. It's starting with rental cars and movie tickets. Once you make a request, the Assistant opens the required website, fills in your details, and allows you to confirm your reservation. It looks impressive, but there are so many steps. It looks like it has lots of places to get tripped up. It probably won't accidentally rent you a giant creep van instead of a sporty convertible, but I could see it getting stuck in the middle of a weird web form.