The Miguel's brand of chips now includes these new Salted Plantain Chips.
Plantains are similar to bananas, but not as sweet or soft.
The concept of plantain chips are not new at all, being a favorite snack food in Caribbean cultures. My step-mother is Puerto Rican, and she's been known to slice up some plantains, fry them, and salt them. You can also find these in most Cuban and Puerto Rican cuisines.
Miguel's is just mass producing it for retail. I imagine other brands sell plantain chips, but out here in Southern California, I haven't seen them.
Plantains are kinda bland. I imagine people from the Caribbean love to eat them plain, but for me, they're like potatoes, where you need to spice them up, top them up, or use them as an ingredient.