
It's not an asteroid, it's an advertisement
For your information, that is a 3D holographic projection of a minecraft sphere as part of a huge advertising campaign put out by a partnership with Pixar and Madison avenue for Apple. Since minecraft is the cool game, Apple has co-opted it as a platform for Steve jobs to make his last Keynote address and to make it one no one will ever forget. As it gets closer the 'structures' will become more apparent until it stops spinning and is stationary and Steve Jobs will speak from the grave announcing the latest product from Apple. The ultimate in presentations. Why do you think they rolled out the 4S and not the 5?
Now you know. And soon the whole world will as well.