Even if a new xbox is released within the next 3 years the 360 wont be killed. Microsoft will chuck a sony for at least a year or two. The only reason the xbox was cut short was because of nvidia and intel. Microsoft was forced to abandon the xbox by them. I don't think they'd cut the lifespan short two gens in a row. Look at what it did to sega, it would be foolish to simply stop the 360's production. Thus I think the 360 will sell for at least 3 years more or so. Will it reach 50 mill? I don't think so. I hope it does though, the better all the consoles do the better the industry.