Why Stephen Hawking said \'Philosophy is Dead\'

Again physicist Stephen Hawking stunned his audiences and readers at the Google's Zeitgeist conference by declaring 'Philosophy is Dead.' In his speech he told now philosophers are unable to update their knowledge on the continuous development in sciences, especially physics became too complicated for them. Understanding the origin of the universe is out of their knowledge.
Are all philosophers going to be buried under the historical archives, and the philosophical books written in Greece by Aristotle, Plato etc; in India should Vedanta, Upanishads, Charvak and recent Bertrand Russell and Jacques Derrida be discarded?
The brilliant scientist is invaliding the mother of science known as philosophy for thousands of years. To some extent it is a fact that scientific reasoning is the key to narrate the physical world and philosophy has nothing to do at the lab. But dialectical arguments of philosophy built the epistemological cornerstones for the scientific investigation. Theoretical physics is a child of philosophy and science is much younger than philosophy.   
Why this universe is here is a philosophical question; science doesn't have much technological know-how to answer the question, not possible even if it has; but the question how the universe is working here is a scientific matter, specially belongs to theoretical physics. Still, paradoxically, a remarkable difference is exists between philosophy and science or physics. But the great scientist Stephen Hawking doesn't speak like Albert Einstein who believed in self-criticism, never was bias in investigation and wise towards science and society. Dr. Hawking's claim that 'Philosophy is Dead' seems to be a statement made by a person who doesn't have any philosophical background. But in his popular science books he spoke like a philosopher; went through speculations based on his mathematical data and drew conclusion about some paradoxes yet to be technologically proven and in fact, to some extent it's too hard to prove.
Stephen Hawking could have told that once the laws of philosophy held the contents of all subjects, now the laws are taken to specialised subjects. But it doesn't mean philosophy is dead; on the contrary, philosophy is being enriched because of its much higher role behind the subjects. For the past two decades Mr. Hawking was criticised by some philosophers for his fanatical efforts to go beyond scientific arena through mathematical analysis. He was answering philosophical questions with mathematical physics which has limitations in answering such old questions.
The book Grand Design written by Stephen Hawking and Leonard Mlodinow mentioned that 'One can't prove that God doesn't exist, but science makes God unnecessary.' This comment clearly indicates that physicist Stephen Hawking isolated science from philosophy but, despite being an atheist, kept God in the discussion wherein philosophy is the essence. This universe is a product from nothingness is, exceptionally, denying causations and bringing out something without reason belongs to metaphysics or views of the Upanishads. Quantum mechanics sometimes overlook causes and effects in the tiniest parts of matters. Dr. Hawking's ambitious theories went on the basis of assumption; too much abstract mathematical data analysis he had shown but through technologies he can't witness what he has forecasted. However, his proposed overrated theory called M-theory didn't ask an observational support, unlikely to quantum mechanics. Therefore, still his theories are in philosophy than proving scientifically as appreciated by human comprehension.   
Most of the philosophers rejected his recent comment and few of them mentioned this as a delivery of another philosophy against the traditional philosophical idea. Every sort of inquiry into the academic field is defined as a philosophy. Still many thinkers are sceptical about the view that science has superseded philosophy because sciences have limitation in empirical inquiry. Dr. Hawking is frequently coming to media for his comment and what he forecasted in his popular science books. He has been criticised for cunningly avoiding a few critical questions and tried to go beyond sciences. He has done so depending on philosophical premises but now he is telling "Philosophy is dead".  
The writer is a journalist; once worked as a science
correspondent. He can be reached at [email protected]