[codingdave]

This is the one that worries me -- "More than four billion hours spent playing PC games"

Tracking usage in Microsoft's own software is one thing. But for the OS to understand which 3rd party apps are games, and track hours spent on them has some deeper implications.

[witty_username]

They probably mean Windows Store apps in the game category.

[alkonaut]

That has to be a tiny fraction of the total hours, making it a pretty bad metric...