I think you've got a good idea making a comparison to the steam engine, but i also think you missed it a little bit
the steam engine is by no means dead today, though you won't find it on the railways, you'll find it in power plants for example -- nuclear, coal, oil ... it's not that tecnology is going to disapear, it's just that it'll be utilized in different ways, where we still will be hevily dependant on it, but it may not be powering the same objects.
idk, maybe i misinterpreted your analog, so lets keep playing with it