Applies as it ever did - to the government. I don't have to allow anyone into my living room to speak their beliefs.
I’m not sure that the American founding fathers or the philosophical influence, John Locke, could have foreseen that tyranny can come from places other than the government. We are living in a world where corporations are often more powerful than governments, and if they are not regulated and bound by laws limiting their rights to refuse essential services, they will press their boot into our necks just as surely as any government.