I can't see the widespread electrification of classic cars other than as a consequence of fuel ceasing to be available or aggressively anti legislation - which isn't going to happen any time soon. Beyond that, the eco-footprint of the typical classic car is pretty minimal simply because they are rarely used as daily drivers and do relatively insignificant mileages each year. They are actually pretty environmentally sound in that respect, especially as they are cherished and maintained long-term and thus not being scrapped, with all the environmental effects that entails - unlike most modern "white goods" cars.
Plus, on an emotional level, ripping the heart out of a Z like that just feels wrong.