With all the US manufacturers supporting SAE, I think the SAE combo plug is likely to be the dominant player in the US if only for political reasons. Because of that, I expect a lot of government supported, and for profit, DC charging stations in the US will be both CHAdeMO and SAE in the near future with almost all the rest being J1772. For example, the California NRG DC stations will be converted to support SAE.
www.cpuc.ca.gov
With the German manufacturers supporting SAE, it seem quite possible that it will be the adopted as the preferred standard in the EU as well.
At least in the US, I think the market for medium range (< 100 mi) cars is very limited, so am doubtful that the charging network, if built, will be optimized for them. The existing CHAdeMO chargers in the US are mostly medium power(30 kw). Even at the max CHAdeMO power (50 kw), these won't be very useful if the Tesla model of high kwh cars becomes more widespread. For plug in hybrids with short ranges, J1772 (6.5 - 16.8 kw) seems fine, but longer range cars really need rates in the 100 kw range for "fast" charging IMHO.
Existing CHAdeMO stations can service medium power charging, but not high power, whereas SAE can do both. Plus, a car with an SAE plug can use J1772 for top-ups as well.
Bottom line is my crystal ball says that if the market for all electric vehicles does develop, the standard will converge on SAE but the process won't be pretty.
