Guinness and Boddingtons Pub Ale have had this for a while(9-10 years), with a round plastic "widget" (I cut a can open one time to find out). I always wondered how it worked.
Ironically the next video in the queue was also the Left Hand Nitro in a bottle, demonstrating the "hard pour" to get the nitro cascade effect and the bottles don't use the widget, so I wonder if they're already moving away from that technology. I think several people now have debuted nitro cans and bottles without the widget.