Seem pretty useless at my opinion. First whatever the side or angle that the phone touch the floor, something will broke. Never seen a broken iPhone before? If they need to shift weight, this mean more weight in the product and more damage on the floor. Second, when you drop your phone, you drop it from a heigh less than 5 feets at a relatively high speed (he touch the ground in less 1 second). Imagine dropping your phone at that height face down in the most perfect condition, imagine the force needed to first spin the phone for miss the main screen. But one spin is not enough because you need to stop the rotation else you add force of rotation which mean more damage to your phone. So detect the fall and 2 rotations in less than 1 second. Good luck Apple! All that for not having a casing?
They should just install jetpack to the phone... /irony.
And by the way... if this new technology is half baked... I'll sue them. Good luck with that.