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

Upper and business class cabins have expanded to the point where the top tier resemble hotel suites more than passenger pods.

New cabins Last month, United Airlines unveiled its new United Elevated interior, which includes sliding privacy doors for all business class seats, and a brand new studio suite experience.

United's new Boeing 787-9 aircraft will offer a larger upgraded selection of premium business class seats and two new business class suites called the United Polaris Studio.

United is also growing its cabin with its Boeing 787-9 Dreamliners outfitted with eight “Polaris Studios,” in a 1-2-1 configuration and 56 Polaris business class suites.