Actually the 3GS update is quite analogous to the iPad 2 update. The 3GS was the first to have a graphics coprocessor so 3D graphics was vastly improved. The iPad 2 does not introduce accelerated graphics but its graphics processor is supposed to be a huge improvement over what was shipping in iOS devices before. So we can expect games and graphics heavy apps to to markedly improve. It's OpenGL ES 2.0 for the win.
3/12/11 at 9:47pm