After the release of the PS4 Pro, one of the more overlooked features or upgrades that came with the console were the subtle enhancements applied to the new Dualshock 4 controller.
The controller looks virtually the same, however there is a new light bar which extends across the top of the controller plate. You can see it clearly as a thin sliver of light displays above the touch pad. The newly updated Dualshock 4 color bar will display the Playstation colors depending on what is currently happening on the console.
Dualshock 4 light bar colors:
Blue: Player 1
Red: Player 2
Green: Player 3
Pink: Player 4
Previously, the only input to the controller was through Bluetooth, even though the USB connection was already built into the controller for charging purposes. It would make sense that Sony fix this issue and allow players to play games over a faster wired USB connection. The theory is that gamers will experience less latency now that you can be wired in, thus giving USB connected players a slight advantage when it comes to their game lag.
Sony is also now claiming that the new Dualshock 4 controller will come with increased battery life. There has been no official statement from Sony in regards to how much batter life that entails, but reports from gamers have suggested the newly updated battery life can last up to 8 hours off a single charge, which would be a significant upgrade over the original controllers.