Turin, Yes, the 737 NG overwing exits are a new design. "self-disposing" - you open it and it flings outwards. 2 springs and a hydraulic damper. You don't need to apply any force (quite contrarily, be careful not to hold it else it will pull you...). No plug, no initial inward motion, but "flight locks", 28V solenoids that lock/unlock based on how many main doors are open, thrust setting etc. Unlike older non-plug doors, the design seems safe enough, no incidents reported (?). Regulators like the design, because it's very quick to open in an emergency. I believe bombardier C series use a similar design, and more aircraft may follow. Only drawback that has been reported so far is that they're not level with the floor.