In the future men will be able to carry children just like women

[Excited Penguin]

Quite possible. But what it does to the emotional bond between mother and child is anyone's guess. Remember that old song? In the year 2525.

What bond is there when a machine is carrying the child?

Nor should there be any. Personally, I would've prefered growing up in a society where the family model was non-existent. Don't just stop at births, remove the "parents" altogether. And that's regardless of how happy I would've been otherwise.