We can say the light bulb was revolutionary now, since we can see the result, but I'll bet at the time it would have been reasonable to view it as just the logical extension of scientists playing with electricity, which they had been doing for some time at that point. It's not like everyone switched from candles to lightbulbs overnight, it would have taken quite some time. While the switch was happening people probably discounted the light bulb as not being good enough, needing electricity that many people didn't have, burning out too quickly, broken glass being dangerous, etc.
If you want something recent on the same scale look at GPS. It was first deployed less than 20 years ago, and only now have most industries that rely on location data made the switch to using it as the primary source of location data. We probably have inventions today that are going to obviously be huge, revolutionary inventions in 10 years, but it's nearly impossible to tell which inventions will end up being important until everyone already relies on them.