Then don't you think that with the above, less surgeons will be needed in the future?

No!
First, there will be still need of 1 man (1 surgeon) to operate such technological device. The remote thing will be useful because there are some very rare pathologies and surgeons usually specialize in just one of them. There is no real "general surgery" but surgeons that get specialized on upper gastrointestinal tract, biliary surgery, abdomen wall surgery etc. Best thing is that a very skilled and highly specialized surgeon from Europe would do surgery on an American patient without taking a flight!