This could make things interesting from GBA-DEV site I saw this reference to this article. That Nintendo was planing on adding an updated Super FX chip for the Gameboy line. I think cost wise it's going to to hurt Nintendo. Nintendo is hurting financially from a 16% decrease in profits and pressure from the new Sony portable that uses 6CM disks. The media is a lot cheaper than the cartridges Nintendo seems to like. Will ROM media meet it's end here?
Even if the chips cost $2 each it would add close to $5 per cartridge using the chip. (assembly costs).
Even if the chips cost $2 each it would add close to $5 per cartridge using the chip. (assembly costs).