Microsoft delivered their annual keynote at the CES (Consumer Electronics Show) 2010 show, which kicked off last night in Las Vegas, and true to form some interesting Xbox 360 news was revealed.

Microsoft announced that over 39 million Xbox 360’s are now in homes around the world, while over 500 million games have been sold since the console launched, generating 20 billion dollars in sales.

Xbox Live also continues to grow in leaps and bounds, with the popular service experiencing its busiest weeks ever between Christmas and New Years. A new member joined every second and over 2.2 million concurrent members were recorded online.

The publisher also revealed that the first Modern Warfare 2 content packs will become available exclusively first on Xbox Live this Spring. And that Project Natal would be coming this “Holiday 2010!”

Microsoft announced that Game Room, a destination for classic arcade games, will be coming to Xbox Live later this Spring. According to Major Nelson, “You can buy once and play on both your Xbox 360 and Windows PC. A new game will be released every week. You’ll be able to invite friends through Xbox LIVE and share your custom arcade and show off your personal collection.” You can watch the Game Room trailer here.