> When I go to a website I want to get the website from the webserver exactly as the server delivers it and not some other page that my ISP thinks is how the website should look.

You could have some hash check to prevent hijacking. The old method would be naive today.

There would be some privacy concerns I guess. But it could be opt-in on the site owners part. I think caching some videos and pictures would save a lot of power.

> Besides with global CDNs we have something very similar but better anyway.

Sure but they are some switches away.