Chinese scientists have developed are robots – wearable “cobots” – that predict the intentions of the wearer accurately 96% of the time. This means that if you have it attached to your arm, it will predict what you want to do and do it (except for the last 4%, then does it break your arm??). This is cutting edge science.
A lot of caveats in this, and the sources is a (usually accurate) Russian propaganda news site, but it is potentially a huge idea.
This would be what you would need to build a true Tony Stark Ironman suit, leveraging tons of torque and jumping over tall buildings. Mechanical operation would just be too slow.