"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
I think you can expect Sony, in the case of PSP specifically, to deliver a technology that is going to reinvent and change handheld entertainment, and take it to a brand new level.