If you think about all the core concepts of wireless communications, detecting whether you are receiving a signal or just noise is the most fundamental operation which triggers the various processes in the receiver, not only for the reception of frames but this also helps to implement spectrum sharing protocols based on listening before talk approach. The basic idea (Clear Channel Assessment -CCA) is simple but 802.11 and 3GPP standards (unlicensed bands) have evolved over years to add many variants to it with the tradeoff of backing off vs reuse, understanding the differences among them, and when to use what is crucial to understand this key concept of wireless communications. As some standards push wireless communications to its maximum limits other standards aim at improving spectral efficiency which focuses on more practical problems than getting the best performance in a laboratory.

Microsoft is reportedly creating a subsystem, similar to the Windows Subsystem for Linux, that allows Android applications to run on Windows 10.