The demos on the video on this page are some of the most impressive technology I’ve ever seen. You only have to one one more step (surgical attachment – swap batteries every day) for us to suddenly be in the first steps of the cyberpunk universe.
It’s not going to be long at all before people start asking for voluntary limb replacement. Look out for the first person with paralyzed legs asking them to be replace with working robotic ones. Following this video I’d say less than 10 years.