The main takeaway is that the front panel Apple will supposedly use for the iPhone 6 isn't indestructible. Neither sapphire glass used in the panel nor Gorilla Glass can withstand being rubbed with sandpaper but, sapphire is more resistant to scratching - as it should be. Since sapphire is higher than sandpaper on Mohs Scale, it shouldn't have been scratched, meaning the new iPhone probably won't use pure sapphire but a mixture containing sapphire. A mixture of materials will also alow the panel to be more flexible.
As for the "not indestructible" part, you'll just have to watch the video and see for yourself.