There is little doubt, that electric drive vehicles will supplant
internal combustion engines just as electric motors replaced steam
powered locomotives. It's just a matter of time.

Just a bit misleading, Larry. Electric motors alone did not replace steam
powered locomotives, diesel-electric motor-generators did. The actual
power
generation comes from a bank of diesel engines, turning generators, which
supply the electric current to the wheels. No batteries involved!!!.

Don't forget that weight is an advantage for a railway locomotive.

They need a lot of pulling power at very low speeds and they need a
reasonably high maximum speed, but acceleration at medium speeds is trivial
for them. (In other words, they don't need to accelerate and merge only an
expressway and they don't need "passing power" on a two lane road.)

However, I won't hold my breath waiting for a light enough power package for
typical light aircraft.

Peter