FYI, the use of MAKO that I have been involved with in orthopaedics is not less invasive. It's technically slightly more invasive as you'll have additional rods inserted into the leg for stereotactic guidance.

It just involves more calculated cuts of the joint to help guide alignment/orientation of the prosthesis, which is normally done manually by a skilled surgeon. Mako can allow unskilled surgeons to achieve much better results as it'll do a lot of the thinking for them, but probably produces similar results for a skilled surgeon but with a lengthier operating time.