As seen in the photo, each monitor has sensors built into it that are activated when a player cuffs a hand over the playing card graphic on his or her screen. When the sensor is activated, the cards, fully animated, peel up from their home on the virtual felt, enabling the player to catch a glimpse of the cards' corners.
Just like a live poker game, each player must be careful when looking at their cards, so as not to expose them to nosy neighbors.