microsoft never said that. they had a sheet for the whole next gen where they believe in 380m consoles sold and i think they believe that if google and/or apple will also release some devices for the tv with which you can play games and do other stuff (mutlimedia boxes) the market could be 1 billion. maybe even something like "gaming tablets" included which they think will come and succeed.
really no clue why people think that microsoft ever said that they will sell 1billion?
€dit:
""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."
what he means with this is that experts believe gaming consoles will sell 400m but you can have devices which aren't only gaming consoles like the xbox one which is more a multimedia machine which can play the same games and do also many other stuff and this market can be 1 billion big.
