In many layouts I have to rely on separating a loop into to separate coordinating loops of data in order to rows of data that stick horizontally while scrolling vertically with the coordinating loop of rows to the side (see google spreadsheets for an example of this). With Position-X and Position-Y, one could use scrolling from the browser vertically with position-y:relative and position-x:fixed, thus only having to load a single loop with the CSS running the positioning of different columns instead of javascript scrolling, height, etc coordination.
In many layouts I have to rely on separating a loop into to separate coordinating loops of data in order to rows of data that stick horizontally while scrolling vertically with the coordinating loop of rows to the side (see google spreadsheets for an example of this). With Position-X and Position-Y, one could use scrolling from the browser vertically with position-y:relative and position-x:fixed, thus only having to load a single loop with the CSS running the positioning of different columns instead of javascript scrolling, height, etc coordination.