Originally posted by Juntai
He had turned off sensory input from the gems. It was the only mentioning of a power down in the story.
Originally posted by Kid Kurdy
He only cut off all sensory inputs, meaning he could be surprised. Apart from that, he had full control over the IG.That's it. It's stated very clearly in the comics.
Except the part where he says he's returning himself to full power you mean. Regardless, my point is that if he could see Surfer then it means that unless Supes is moving faster he's not going to be moving too fast for Thanos to follow.