The difference is that the model T offered people a transportation alternative that was a tangible improvement to the status quo.

Electric cars currently do not offer the average person a better transportation option in moving from A to B.  They are more expensive and for a good proportion of the North American market unproven reliability issues related to driving range and driving conditions (i.e. extreme cold and heat).   In other words for your average consumer there is little compelling reason to abandon the traditional gasoline or diesel engine.

Not to mention that the "electricheads" apparently seem to think that the electricity required to power these cars comes from pixie dust and the battery and other components are greener than fossil fuel extraction.