Just some reasons as a robotics enthusiast: Hardware: - lack of off the shelf parts suitable for such projects. For example sensitive enough and compact at the

Just some reasons as a robotics enthusiast: Hardware: - lack of off the shelf parts suitable for such projects. For example sensitive enough and compact at the same time pressure & force sensing. Also actuators, most that we have off the shelf is too slow, too bulky, too weak, or too strong/heavy to the point of being unsafe in direct contact with humans. Software: - one requires very low latency control loops and communications. If this is to go beyond local network use it will also have to include some software that will maintain the "feel" while connection gets dropped briefly, packets are delayed etc. - whenever force feedback is used one requires robust safety protocols. If the manipulator is strong enough to simulate a force of lifting a heavy object it might be capable of breaking your arm or a finger. Software has to prevent this even when it "glitches" or if there is hardware failure. No doubt there is lots of much more advanced reasons. These are just from the top of my head.