Wow! This is amazing. A few years ago RL was starting to be applied in the robotics domain, with many doubters. Fast forward a handful of years and this! 
https://twitter.com/OpenAI/status/1184135128869527552 …
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Many roboticists and RL researchers, including myself, consider this to have pushed the state-of-the-art in robotics/manipulation because dextrous hand manipulation is challenging, as is sim2real. I am impressed. (solving the rubics cube itself is not relevant).
i actually agree (mostly) with this, though the bluetooth sensors etc undermine it a little bit. again my objection is not with the research but with the framing.
