Controller button design

[Bert Freudenberg]

I was reading about keyboard and controller button usage in the HI  
guidelines:

http://wiki.laptop.org/go/ 
OLPC_Human_Interface_Guidelines#Basic_Function_Keys
http://wiki.laptop.org/go/ 
OLPC_Human_Interface_Guidelines#The_Controller_Buttons

One thing I immediately liked were the graphical labels on the Enter  
and Escape keys, which match the screen graphic. Now, why aren't the  
same graphics used on the controller buttons to mean accept and  
cancel? This would immediately convey the function of the two primary  
controller buttons, which are now randomly assigned an O and X label.

- Bert -