I’m actually reasonably excited about yesterday’s American Airlines announcement that they’ll be adding a premium economy product to their international widebody fleet (other than their Boeing 767s which are slated for retirement).
The only meaningful downside, it seems to me, is the potentially bad news surrounding the unanswered question of how upgrades will work — whether the introduction of premium economy means that upgrading from economy will mean a premium economy seat, rather than a business class seat. But it doesn’t have to mean that at all.