There are going to be lightweight criticisms of this concept (Musk invites those by making someone dress up in a morph suit and dance like a robot). But there are also going to be more realistic criticisms such as the fact that whilst Humanoid robots have remained science fiction, non-humanoid robots have proliferated massively across industries that were previously fully manual. It'd be great if we could build a humanoid robot to replace all those humans trudging around Amazon fulfillment centres- but we don't need to, because those robots have no reason to be humanoid in the first place.
I'm tired of people pretending that just the aspiration to change the world excuses you from real criticism of your ideas. There are plenty of people out there changing the world- some of them mentioned in the article, and those people actually thought out what they were doing before getting a guy in a morph suit to dance in front of the worlds press. Let's not forget, we're still waiting for the autonomous driving promises Musk has failed to deliver on for years now.