Two of the nation's largest airlines - Delta and American - are going head-to-head in offering the most stylish, comfortable, and tech-friendly seats in the sky.

Almost simultaneously this month, the carriers announced upgrades that would include all-new seat categories at Delta and power outlets and satellite-based Internet on American.

Passengers who fly coach will benefit from some of the upgrades at Delta and American, but most of the investments will go toward pampering high-spending elite fliers.