Being human has never really been one thing - every generation looks back and judges the generation previously or the one before that or the one before that...We can only ever be products of our environment. People a thousand years from now at our exponential rate of technological expansion will think we were total savages.

Now as for what defines us as "Human" is a matter of opinion - personally I've always viewed being "Human" as empathy - as thinking and caring about others instead of merely yourself. It's difficult to say with the media as over-saturated as it is whether or not we care less or more, but I certainly meet loads of decent people in the real world.

I don't think we're really losing ourselves. I think doom and gloom rises to the top on the internet especially and we hear loads of bad things going on in the world but the world is still full of good people who are worth enduring the bad for, people who are worth caring about despite all the evil.

And as long as we ourselves remember we won't lose ourselves.