Macbooks have always suffered a bit in graphics processing power because they don't have a separate graphics processor; Macbooks use the CPU to render graphics.
TUAW
reports that the new Macbooks may have some Nvidia power in them which could add some more power and put the Macbook in a bit of a higher class. According to the source Nvidia has been showing off the new Nvidia powered Macbooks to their employees.
I for one wouldn't mind a Macbook with a little more giddy up in its go. Anyways the expected date of these new Macbooks is October 14th so if you're in the market to buy, hold out a little longer.