Honda who have been in need of a sport utility vehicle in order to grab their share of that part of the market, which has grown considerably the last decade have taken almost desperate measures. They have simply bought the rights to re-badge the Isuzu Rodeo as the Honda Passport and marketed it as an all new model. The last and maybe the most logical reason is that all manufacturers are striving towards 'the perfect car'. All cars are supposed to offer a maximum of performance, passenger room and cargo space, and a minimum of fuel consumption and cost to manufacture and maintain. There are only so many ways to technically achieve these goals.
Cars tend to get more rounded edges in order to be more aerodynamic.
The trunk lid is high in order to offer greater cargo space without imposing on the passengers. The design of the trunk lid is also approaching the 'optimal' shape for easy loading and access. Windows are large and pillars are thin for better view. The lights, both back and front, are homing in on the design for maximum visibility. The wheel base is decided on basis of good turning ability both in the case of parking and at high speeds.