While premium passengers reap the rewards of competition among airlines, it’s a different story in back. One problem, according to Tim Winship, publisher of Frequentflier.com, is that carriers are flying at near-full capacity these days, so you can no longer count on having an empty seat next to you. At the same time, airlines are squeezing in more seats, using slim-line models that are narrower and have less padding than previous versions. On the flip side, new planes do offer better in-flight technology both obvious (touch screens) and less so (humidity controls; mood lighting). Whether this counteracts the increasing claustrophobia of economy is up for debate. One thing is certain: those premium economy seats are looking mighty tempting.