I've seen these pop up from time to time in other states. Usual buffet suspects, plus a counter where you assemble raw materials that are then cooked up fresh by some feller usually in a chef getup.
There appears to be a chain, based in the South I believe, Hibachi Grill & Supreme Buffet, that has been at the forefront of opening these types of places. There's one near a relative of me in PA, and they're thinking of opening another. They allegedly also opened somewhere in SNJ, near 295.
I remember one from a few years ago in North Bergen in that same shopping center with the multiplex straight off the 495; being NJ, it had a decent selection of items popular with Latinos.
Any hints about these coming to the North?