No, it's a visionary view. Copyright will die soon. 300 years is long enough.
Considering the fact that most nations support WIPO and seeing the economic costs happening because of some corporate stupidity (newspapers are erecting paywalls when they should never have given away their content in the first place, which a lot of players did in the dot com boom thinking eyeballs = profit), I think you're too optimistic with your estimate, assuming the anti-copyright movement doesn't die off as a cultural meme the same way communal living did.
I doubt you'll see it abolished in your lifetime.