The Threshold for World-Changing Discoveries Has Risen

Could Einstein be the last fortunate scientist? It appears the threshold for world-changing discoveries has significantly risen. When last did we hear of people like Isaac Newton in his time? Are we impatient? Or have we practically exhausted our 'big discoveries'?

Are there so many learned super performers today that it is difficult to stand out? Or are we standing too short to make the difference?

Do we need more brainpower? Do we need a healthier mind or body? Or do we need help?