Vegetables are WYSIWIG; this Surface thing less so.
It is a bit as if they sell you a one pound coconut with a sticker "a pound of coconut milk" on it.
Historically, companies have been forced to change their ways for less (prime example: monitor sizes used to be measured on the display area, but that grew to 'visible part of the CRT' and from there to 'CRT diagonal', and, IIRC, 'diagonal extended to the edge of the housing')
It is a bit as if they sell you a one pound coconut with a sticker "a pound of coconut milk" on it.
Historically, companies have been forced to change their ways for less (prime example: monitor sizes used to be measured on the display area, but that grew to 'visible part of the CRT' and from there to 'CRT diagonal', and, IIRC, 'diagonal extended to the edge of the housing')