True, but Windows 10 has more than 200 million users, which makes it bigger than all versions of Mac OS X and Linux combined. The US DoD has already started to

True, but Windows 10 has more than 200 million users, which makes it bigger than all versions of Mac OS X and Linux combined. The US DoD has already started to move 4 million users to Windows 10, which is a good sign. Most businesses will be planning to move by 2020, when Microsoft stops supporting Windows 7 (though I expect a few daring souls will be hoping for an XP-style extension). So, Windows 10 is slightly ahead of track for a billion users at the moment. Just how many gamers are we talking about here?