That rationale doesn't seem to add up - if you render the same content in 1080p and 4K, the only change is the amount of memory bandwidth for filling pixels. Mu

That rationale doesn't seem to add up - if you render the same content in 1080p and 4K, the only change is the amount of memory bandwidth for filling pixels. Multicore support in the layout engine will help speed up layout calculations (and maybe CSS), but the amount of work involved in that ought to constant regardless of the display resolution.