Once a slightly fancy middle ground between first class and coach, business-class seats are getting serious upgrades. Caviar, anyone?

Airlines like Air France, Lufthansa, and Cathay Pacific have all recently invested in first class at a time when others have turned their focus to better business-class seats.

Lufthansa. Lufthansa has always had some of the nicest business and first-class cabins, but they’re about to get even better. It also has a newer line of Allegris First Class on Boeing 787-9s ...

These first-class cabins go beyond bigger seats or nicer meals with tailored service, restaurant-quality menus, and, on some aircraft, entire rooms in the sky. 9 Airlines Offering First-Class ...

Japan Airlines' A350-1000 features First Class suites with 43-inch 4K monitors, Bluetooth connectivity, and enough width to seat two. Passengers can choose mattress firmness before departure.