You've got the wrong quote and person. I'm talking about the following where Yusuf specifically said units and was heavily focused on the entertainment and other aspects of the One boosting its appeal and broadening its consumer install base, but whatever your semantic takeaway, obviously Microsoft didn't come close to selling one billion units, no matter what metric you use. Hell, xCloud hasn't even launched yet.
Also, the reason I brought that up wasn't to conflate consoles with cloud gaming, but to highlight that lofty figures in relation to potential install bases, rarely correlate with actual sales or adoption.
Eg, the Xbox Ones entertainment offerings didn't actually broaden its appeal or lend to considerably more unit sales (the opposite happened).
Xbox titles coming to PC didn't dramatically alter the success of Xbox or its software sales and revenue, contrary to what some on these forums predicted, in part due to the PC gaming install base being so much greater than consoles (though it has obviously had some positive impact).
Likewise, just because there is a potential 7 billion gamers out there who could use cloud gaming, doesn't mean anything remotely close to that number actually will. As I mentioned, I'm expecting cloud gaming adoption to be rather slow, and still well behind local hardware gaming, even into the end of next gen, though of course I might be wrong and maybe cloud gaming suddenly explodes overnight. But either way, that was the point I and others referring to that install base reference point were making.
Xbox One: Microsoft aims for 1 billion lifetime sales, 100 million Xbox 360 units
Microsoft predicts 1 billion next-generation console sales
"And the way we'll break into those segments is by hitting new price points, getting new classes of entertainment to come with the Xbox, and breaking into new customer segments. So you'll see the Xbox 360 continue to exist, even as we launch the next generation Xbox One."
"Every generation, as you've probably heard, has grown approximately 30%. So this generation is about 300 million units. Most industry experts think the next generation will get upwards of about 400 million units. That's if it's a game console, over the next decade."
"We think you can go broader than a game console, that's our aim, and you can go from 400 million to potentially upwards of a billion units. That's how we're thinking of the Xbox opportunity as we go forward."