Ectogenesis would allow for more prenatal adoption and would almost certainly reduce the number of abortions. I’d imagine that it will be expensive to start with, but will come down in price over time. Currently, gestational surrogacy costs about $150,000, so once it drops below that price it will start to replace surrogacy, probably quite rapidly. It will have to get a lot cheaper before it becomes a feasible option as a simple replacement for natural pregnancy.

The Catholic church will ban it :P.

The down sides might be an even greater reluctance for companies to offer parental leave, women and trans men who choose natural pregnancy being stigmatized (and worse, possibly their children). It’s going to also make divorce court more interesting ;).

I highly recommend Lois McMaster Bujold’s Vorkosigan Saga books, many of which go into the social consequences of ectogenesis in a more nuanced way than Brave New World.