FPGAs aren't particularly energy efficient compared to ASIC implementations of the same hardware.

This is the point of FPGA in consumer products right? Ship the DVD player ASAP see if it sells then spin silicon.

Generally you don't ship FPGAs in consumer devices you plan to sell in high quantities, as they're very expensive in addition to not being very efficient. Small FPGAs or CPLDs can be used for low-volume devices to avoid the huge non-recoupable expenses of an ASIC spin -- because of the specific requirements of the application.

They're almost exclusively used for prototyping ASICs.

Not sure an FPGA will output enough work to be economical. Probably still stuck with ASIC.