End to end efficiency is absolutely critical for making any wireless power endeavour viable.
Beyond delivery loss, don't forget that there are other CAPEX/OPEX considerations.
For example, an underwater cable from an offshore wind-farm might be a more efficient means of energy delivery but it's installation and maintenance cost would be much much higher and require more time to deploy than a wireless solution.
That is inevitably a significant part of any economic benchmarking.
Beyond delivery loss, don't forget that there are other CAPEX/OPEX considerations.
For example, an underwater cable from an offshore wind-farm might be a more efficient means of energy delivery but it's installation and maintenance cost would be much much higher and require more time to deploy than a wireless solution.
That is inevitably a significant part of any economic benchmarking.