[CSS3] @resolution at-rule

I propose a '@resolution' at-rule, for specifying rules applying to screen resolutions. 

@resolution(800,600) { 
div#content { 
width: 459px; 
} 
} 
@resolution(1024,768) { 
div#wrapper { 
height: 90%; 
} 
} 
The first agrument is the screen width, the second one the height. 

If this is a daft idea just tell me.