I regret the passing of some of our culture. I don't want an homogeneous world. But hey ho, you can't p*ss in the wind. Hey ninny ninny...
I'd sooner see an homogenous world than the conflict-ridden, prejudiced-deranged one we currently live in. In such a world, there would be a return of interest in the old things anyway. But, after all the rubbish associated with difference had passed away. Nothing wrong with difference, but the world seems to think that conflict and prejudice MUST accompany difference. In reality, there are differences, but there are no differences. We are also so very similar the world over.
It might seem like a silly example, but on Star Trek The Next Generation they 'go back in time' with the ships computer to experience the past. But, a sanitized one. In the distant future, people may recover the past and differences, but not attach deep meaning to them. Not with a computer (but, who knows?). But, by reclaiming the past. Like those huge battle scenes reenacted.
Hopefully, globalisation will take us to such a world eventually.
I think also in a similar way that political correctness will do it's job of helping to eradicate racism, sexism, etc. in time. Then, political correctness will disappear because it's done it's job. Along with it will go the excesses of political correctness.