I think he meant Marketing.
Remember, we first saw this technology from Sony back in 2016. Today, the same technology can be found in Xiaomi phones under $300.
Actually it was even further back, in 2015.
I dont doubt there are challenges, but it needs to be better explained or marketed if they want to call it incredible feat of Engineering, especially when Apple has already done Touch ID.
Security has to do with Apple's Security Enclave, so it is not part of what makes Power Button Touch ID incredible feat of Engineering. Scaning a smaller potion of it isn't either.