Ethernity going for 48 port DSLAMs. You need a heckuva lot of processing power when you are pushing 10-20 gigabits through a DSLAM. The company has been supplying network/flow processors for Ethernet controllers and similar for more than a decade.
Xilink's Zynq combines dual ARM cores for control with programmable gate arrays for the dedicated application. FPGA's can be extremely powerful today. A different "Xilinx 16nm FPGA packs 5.2 billion transistors to support seven programmable cores." Rick Merritt.