The "Dick Tracy" phone was regarded as wild fantasy at the time. Now our phones are unimaginably more capable.
Have you boarded an airliner in the last 3 years? They are deathly afraid of "smart bags" right now. As far as I can tell, the smart bag is mainly just a battery to charge your phone. They woukd freak out if it had motors on it.
It wasn't too long ago that simple wheels on luggage was unimaginably luxurious. Follow-me luggage could be popular very soon.