Yes, the Internet has made a non-marginal impact on access to pornography, just as it has made a non-marginal impact on access to information as a whole.

While pornography in general leads every time a new technology is created - say, pornographic books were among the first books published after Gutenberg invented printing... the Bible was among the first books as well... other, non-pornographic uses of new technology do pick up, eventually. So the Internet has given wide access to both pornography and non-pornography.