Mining started out with CPU's, then with GPU's, then with FPGA's, and now ASIC's. What's the next technology to make mining an order of magnitude or two more ef

Mining started out with CPU's, then with GPU's, then with FPGA's, and now ASIC's. What's the next technology to make mining an order of magnitude or two more efficient? D-wave computers perhaps? Those cost quite a bit, though.