The main worry I have is centralization of the internet to the point where data packets can be hashed to a global ID for internet access. As it is now, that would require a lot of restructuring and the breaking of code, but not impossible. Just impractical, except for the fact that those at the top with nearly unlimited resources want it to extend their hold from the IoT to the internet of bodies. If the last 3 years have proved anything, it's that they don't mind breaking things in order to get what they want.