Why is the computer so important machine? Can you answer my question?

If you are a child, you can say Because it is playing so wonderful games...

If you are a mathematician, you can say Because it calculates every function in a moment...

If you are a musician, you can say Because it gives me the opportunity to compose and play every kind of music so easy...

If you are... anybody, you can say Because it gives me every information I need, every entertainment I need, every contact I need, every mental instrument I need, etc.

If you are a philosopher, you can say Because it is the first machine, which can imitate and even to surpass the man in the activity, which made him a man—thinking. That's just the point!

In this section I'll try to reveal some of the first men, who dreamed for a thinking machine.

Only two things are infinite, the universe and human stupidity,
and I'm not sure about the former.
Albert Einstein