The latest show rightly had concerns that if your boot disk dies then the boot partition Lion creates will be of no use to you after you have already downloaded and purchased apple's next OS - Lion.
Apparently there is a way to extract and burn a Lion install disk, more here
OS X Lion Boot Disk Discovery Saves The World, But Activation Persists [How To] | Cult of Mac
Apparently there is a way to extract and burn a Lion install disk, more here
OS X Lion Boot Disk Discovery Saves The World, But Activation Persists [How To] | Cult of Mac