1. Einstein became famous and a household name in the year 1919, when during a solar eclipse, it was found and experimentaly proved, how gravity of the Sun bends light (which was predicted and measured by Einstein about 15 years back (1905))

2. Einstein became famous when he redefined Newton's definition of gravity, proving that "action of a distance" is wrong.

3. From Einstein's theory of gravity we know (and in fact we are now trying to measure it now a days) why a distant supernova changes the height of Empire State building.

4) Einstein's is famous because of the nature of his invention, we have been living in a Universe which is defined by him; for example: the concept of relativity, which is highly unintuitive concept, but the moment we understand it, we say "how the hell he understood/guess it".

5) Einstein is famous because of his definition of time-space relationship is more than a science fiction.

5) Einstein is famous for his look; he just looks like a genius; and on the top of that he is humble.

Now question is would there be another Einstein? Yes, of course, but not in our lifetime.

However, there are lots of inventions in the area of particle physics, as Richard Feynman once said, "Now I can say nobody understand particle physics", it's a extremely complicated area to understand any behaviors of those sub atomic particles; so it has little meaning to ordinary people.

Anyone can get Einstein like fame, by answering and proving one of the following questions,

1. What is gravity?
2. Why is the Universe so large and so old?
3. (How) did the universe begin?
4. (How) will the universe end?

We will know at least one answer of the above within next 500 years. A new Einstein will born.