For me, ZenCash is more powerful. I'm not sure what the exact reason is for fully rebranding. Maybe only design & logo can be changed.
It's more about a brand expansion to represents the perspective of the community. Horizen is not only a cryptocurrency but a platform with privacy-focused apps. So Horizen needed more than a fresh logo and the website revamped.
I'm curious, how will an individual's data be protected (private) BEFORE it gets put on their "privacy" blockchain?
I'm not asking about currency that can be kept private with a hardware wallet. I'm asking about a piece of hardware your data is on before it gets on another piece of hardware that's not encrypted and may be compromised BEFORE it gets uploaded to their blockchain. Or visa-versa, data that's on a piece of hardware [That may be compromised] and someone now wants to put that data on a privacy blockchain AFTER that data has already been compromised from being entered on a piece of hardware that has been compromised.
The marketing sounds great and all but has everyone REALLY thought this through?
As far as I know there are no projects in existence, that can fully answer on your demands. All existing projects are based on technology (Not hardware) -> piece of code and mathematics.. But in the near future this is not excluded. We are solving problems one by one. Also we are raising awareness about need for privacy, as basic human right. 100% privacy is not possible even with the best hardware and software in the world, there will be always a human error and stupidity.