Normal users don't know what MCP is and will never use an MCP server (knowingly or unknowingly) in their life. They use ChatGPT through the web UI or the mobile app, that's it.
MCP is for technical users.
(Maybe read the link you sent, it has nothing to do with defining a new standard)
Normal users will increasingly use MCP servers without even knowing they do so - it will be their apps. And having e.g. your music player or your email client light up in the ChatGPT app as something that you can tell it to automate is not just for technical users.
Anthropic wants to define another standard now btw https://www.anthropic.com/engineering/desktop-extensions