I wonder how tiled GPUs will perform compared to "traditional" ones considering that resolution in mobile phones is increasing so much, so the size of the tile

I wonder how tiled GPUs will perform compared to "traditional" ones considering that resolution in mobile phones is increasing so much, so the size of the tile (in the case for PowerVR, 32x32) gets dwarfed by the total resolution and I guess on-chip memory is very expensive. I mean, if the tile size was 1x1 we can see it wouldn't be efficient, so how the architecture will keep up with this trend?