From what I understand is that for video cards still containing 2D
acceleration those 2D acceleration processors are just little more then
copy-n-paste versions of the processors developed over a decade ago when
people still cared about 2D performance.
Once popular gaming switched gears from 2D side-scrollers to 3D shoot-em-ups
then all development regarding 2D processor cores halted completely for
mainstream systems. I figure all advancements in graphics and rendering
acceleration have occurred on the '3D' side of the hardware since around
1998 or so.