I must know a half-dozen people here in the states who just put up with their cracked screens. I did for a year until bits of glass ended up in various places like the rug and my thumb.
A close friend worked in materials on the iPhone team and remembers the day Steve came in and said "I'm sorry guys, I just can't get used to the plastic screens. It gets smudgy greasy and scratches with my car keys in my pocket."
And they said "STEVE! NO!! Glass breaks, we can't get parts in time."
So Steve went to his office and dialed the CEO of Corning Glass.