IMHO for every invention that's the definition of "revolutionary" that matters. The first lightbulb isn't revolutionary, it's a nifty toy invention that doesn'

IMHO for every invention that's the definition of "revolutionary" that matters. The first lightbulb isn't revolutionary, it's a nifty toy invention that doesn't affect anything, much less cause a revolution like the first practical efficient general purpose mass produced lightbulbs did. The first radio isn't revolutionary, the first practical efficient general purpose mass produced radios make the revolution. The same for computers, the same for smartphones - iPhone was revolutionary because it impacted the world; while its competing predecessors that had almost the same tech did not and so were not revolutionary.