Does this spell the end of bluffing in poker? Or could scammers exploit their opponents with it?
Reading skills are maybe the most highly valued skills in poker. Top players like Phil Hellmuth can win more and lose less than others because they can pick up on the smallest changes in their opponents' facial expression or posture.
Listen to what Hellmuth himself has to say about the significance of reading people well:
Watch him perform some of his "White Magic" here:
The essence is this: If you want to be a great poker player you better understand what the guy on the other side of the table is thinking.