Who will take his place? Who will be the Stephen Hawking of my children's generation?
As a society we should work hard to find, celebrate and give a platform to the Stephen Hawking-s and the Carl Sagan-s of tomorrow. The impact of such "celebrity scientists" (I do not use that term pejoratively) is far greater than the measure of the work they have done. It is how they inspire an entire generation to seek out knowledge, understanding and fill us all with a sense of humility, awe and wonder.