Leonardo's inventions in use

I've seen a document about Leonardo da Vinci on TV. They manufactured several Leonardo's inventions exactly as he designed them in his notes and tried whether they'll really work. A parachute, a hang glider (with one minor modification) and a diving suite worked perfectly. Impressive.

All Leonardo's inventions were forgotten and when discovered again, all of them were already reinvented by someone else (in many cases hundreds years after Leonardo died). NASA inspire with his notes to project its robots today.

How many inventions wait for its rediscovery? Could there be such invention in times of science we witness? Maybe not, but I really have to admire Leonardo as a greates genius of all times.