Digital coherent transceivers: From algorithm design to economics

Who is the actual customer for the DSP? How much is the customer willing to pay for a 1dB better reach? Can the operator use the new DSP on his installed base? What's the value of a lower power consumption? Can the operator use the full flexibility of a chip with various modulation schemes and line rates? How many different DSP designs does the segmented market need? How much does the development cost and what are the part costs in production?