To be honest, if I'm looking at all the people who use the Chrome browser, who use Windows 10, who use smartphones, and who all have opted into this control and surveillance, I think that putting cameras in places with rampant crime and abuse is a good way to stop it. However, if you only put cameras to the places of the city where crime is most present, it will just simply move. Therefore its a good idea to place cameras into every part of the city. If this is only done in cities where crime is very present, then its a good move!
Also, these cameras can't be turned off by police officials as easily as body cameras can, so I think its more likely to see better proof for police brutality and to pick out the bad apples.
Obviously, you need to watch out that these data don't get into wrong hands and maybe get used for extortion.