Another use for the fingerprint sensor on your MacBook Pro or Android phone: a password-free way to log into websites and web apps with the Chrome web browser. In the Chrome 70 beta, fingerprint web authentication is now enabled by default for Android and MacOS, according to an official Google blog post. (No word on Windows laptops or iOS devices yet.)
Fingerprint scanning could be used as an easier alternative than typing in your password, or act as an extra layer of security with two-factor authentication.
It seems like Google has been placing more emphasis on fingerprint scanning for the web recently. Last year it added fingerprint scanning to the Chrome OS -- note that Chrome OS is a different thing than the Google Chrome web browser, but both are internet browsing machines -- despite the fact that no current Chromebook has a fingerprint sensor. This month Chrome OS code was spotted referencing fingerprint sensing as an "out-of-box experience."