I'm not sure if there's any sort of metric for how successful Aldebaran Robotics' Pepper robot is at working in customer service. People are certainly buying them, but by itself, that doesn't say much about whether it works and whether people actually like it and find it effective. In any case, Hitachi wants to get a piece of whatever Pepper's going after, and to do so, they've upgraded their EMIEW robot for a customer assistance role. At first glance, the new(ish) EMIEW3 looks almost identical to EMIEW2 (which is about a decade old at this point), but the differences are significant once you notice them. EMIEW2 had single wheels for feet, while EMIEW3 uses what look a bit more like rollerblades, which I bet make balancing much easier.