Mark always been framed/stated for stealing user's data or invasing user's privacy but apart from these, this guy has always been one step ahead in making new research, technology possible by experimenting new things. First with the AR/VR which didn't work I guess so he pivoted from that to Rayban glasses, and now this.
Cool, Great UI and showcase btw can't this be used as plugin in real-world. Like in my claude-code when it is reasoning or generating code I have this tool to measure real-time speed of the tokens.