That’s one eighth of the earth’s population, all playing Xbox every day.

That's more than five times as many daily players as total Xbox consoles sold in the past 25 years.

I agree that it is not going to happen. I love playing video games, but I don't play them every day. Even when I do play, it's not always on the same console/computer/device.

The only way that MS can get even remotely close to one billion daily users is with mobile gaming. Most of what I can find with a quick search indicates that nearly 75% of the world's population has a smartphone. That kind of hardware distribution is hard to beat. But they would need a thousand apps that each have a million daily players to meet that goal, which is simply unrealistic, even for a company of MS's size.