yeah you're still going to get hurt and possibly be killed, but it could help prevent people from hitting the windshield of the car and could possibly save a life. 10cm doesn't sound like alot, but by moving it in a higher angle, it will absorb some energy from the impact. Besides, I don't think most people are actually hit at full speed, as I'd assume most people would hit the breaks if they see someone standing in front of them.
If it's an extra feature, I really don't think it would be worth paying for it. But it's not bad as a standard feature.