[alasdairking]

This is vital for accessibility tools, like screen readers for blind people. Also for as-you-type word prediction tools, autocorrection that works globally.

More generally power like this lets you turn Windows machines into A Thing That Does Just What You Want, rather than a locked-down thing like an iPad. Which are also great, but a different use case. For example, you could use this for exam proctoring, or kiosks, or remapping Windows keys to particular functions in your video game or Android emulator.