One thing that must be considered when discussiong DC distribution is the limited nature of the application. It only works at very high voltages, too high to be safe at the "street level" where humans interract with electricity.
I think DC distribution in a building can make sense, especially with the more recent prevalence of electronic loads, and we already know that HVDC grid ties make sense. But there is a LOT of transmission and distribution in between where DC makes no sense at all.
As in all things, there is no one answer; it takes a lot of different instruments to make a good symphony. Edison should never have spurned Tesla, together they would have been able to realize the greatest potential from the outset.