I'm guessing it'll be similar to NZ's "Economy Skycouch" where people will be able to buy 3-4 seats at a time for 1-3 people at the same time and have an entire row to themselves. I'd imagine it'll be nice for a couple to share a 3-seat row 'bed' or a family (parents with 1-2 kids) to share a 4-seat row 'bed' without paying for J.