Comment by alkonaut

It's a prototype. But yes, the seats are going to take the trend of "lighter seats" even further. For example, for such short flights it's probably worth not having tables in the seats.

BUT, where current aircraft are usually constrained on size, cramming as many passengers as possible into the cabin is the goal.

Here, space will be less of an issue than weight. So cabins can offer more room between seats minimalist seats.