With an aim to provide more leg space to the passengers traveling by air, manufacturers are coming out with newer designs that feature a comparatively smaller profile.

Latest in the line are the standing chairs that provide a little support and the passenger travels in an almost standing position. This design favors the airlines to a great extent for with these seats they can accommodate a larger number of passengers in each flight.
This is because of the fact that this design will allow closer row spacing to accommodate more passengers.
Via: Yankodesign Via: Airbus