Anybody have any ideas on how the Big Boys will handle the ever-increasing demand for bus-bandwidth between the CPU/mem and the graphics card?

I mean the AGP bus is maxed out with just a Geforce card, so right now there wouldn't really be any justification for getting a Geforce2 for heavy work and lots of polys. For games the extra fillrate will do it's job, but low bandwidth is a real problem, and it's getting worse all the time...