It's not a leading edge. It's just an edge. Porn existed as long as humans existed, and it still exists. It's not leading anywhere, it's just is, for people that need it. It's not new, and it doesn't by itself spell doom to anything - it has always existed on the edges. But let's not pretend it is some fundamental cultural achievement. It's just a lowbrow entertainment it always has been. Sometimes it is socially acceptable to consume it publicly, sometimes it isn't - but it's not leading anybody anywhere.