Many people usually looks at design from design features perspective rather than the subtleness of it. After all, they're all rectangular with bezels and screen

Many people usually looks at design from design features perspective rather than the subtleness of it. After all, they're all rectangular with bezels and screen in the middle. It can't be much different, right? However once you start looking in details there will be a lot of differences, subtle or not. Are the bezels and screens completely flat in a single piece? What are the visual featuring of buttons? How black/white it is? etc.