In the face of all that he has achieved in his short life, the thing that saddens me most is he won't get to see all the cool technologies and gizmos we'll have

In the face of all that he has achieved in his short life, the thing that saddens me most is he won't get to see all the cool technologies and gizmos we'll have in the future. He laid the ground work for a large part of this future, it's so sad that he won't be there to witness (or shape) it.