This isn't something I've thought about much, but public officials in my area are in the midst of trying to institute it in my county. My inclination is to be against it. I understand that urban areas suffer from white flight and the quality of schools in particular can go down considerably. However, I am a localist and the idea of moving children and detaching their education from their own community seems counterproductive to me. Will urban children who succeed at these new schools even want to return to their own community and rebuild it? It seems to be an effort to treat a symptom rather than a disease. There also seem to be fundamental issues of fairness since people move to specific areas to have their children schooled there and often pay higher property taxes for the privilege. That's not my biggest concern, but it exists. Also, thanks to section 8 housing this ability to choose where you live isn't limited to the rich and in my area I would guess that there is only one suburb that would be particularly hard for a lower-income family to move into (ofc, in any suburb transportation could be an issue for families without much money). I myself went to a suburban elementary school in the area where probably 20% of the kids were from a large section 8 apartment complex.
These are just some initial thoughts. I'm open to changing my mind and am hoping to see some different views on the subject.