A handful of people have asked why not go wireless instead? I know my reasons (speed, privacy, and we have an existing fiber loop) but are any wireless technologies good enough that cities should consider them?
So yeah, I think there are plenty of justifications that allow wireless to make as much or more sense.
For example, a backhoe could quickly destroy a large area of fibre coverage, where as, depending on how its implemented, a wireless outage would be more like a brown out in a small location.
Wireless (if it's not highly directional at the last hop) would also have a VERY different level of coverage. Slower than fiber, sure... but fiber would only be fast at that single point of termination, and most folks walk around with phones, tablets, watches, laptops, etc. Few people even run cable to their PC's, and just use wifi from wherever their access point got installed.
Also, if all neighborhoods were blanketed with free wifi, then there'd be FAR less reasons to have personal access points in the home. This could significantly reduce the congestion, especially in densely populated areas. This could end up significantly improving the usable wifi speeds.
Personally, I'd rather have the fiber, and I'd really rather have both the fiber and wireless (for both redundancy and coverage reasons).