As a roboticist, it's really clear to me that this sort of transfer in controlled environment is hard but doable. I think it's already been demonstrated many times and I'm not that convinced that there is anything new in there except more GPU + fancier robot.

I'll be impressed by RL is a) they manage to do sim2real in open environments, think Doom -> office building or b) they manage to get data efficient enough that sim2real is still necessary but you don't have to do real data collection with 10 parallel robots for days on end.

As someone in mobile robotics as opposed to pure manipulation, I read these papers and I'm like: "How the hell am I supposed to get this to work on a robot moving in the real world???". I don't see anyone being close to this right now.