Regardless of what one thinks of Russia or Ukraine (not that one in ten-thousand Americans know the fine historical details of Russian-Ukraine history, myself included) this is an important document.
This is a manifesto or policy statement which will guide Russian policy long into the future.
You can equate it to Deng Xiao-ping’s “one China, two systems” policy declaration of 1979, for Hong Kong and specifically, Taiwan.
This policy statement only matters until Putin is carried feet first from the Kremlin.