So first off how possible would be to see a timeline where technology progressed faster in general then OTL? Let's assume that the a good chunk of the 19th century would be what we'd describe as "steampunk". Only with technology advancing beyond that point as time moves on.
Now the second part would be what kind of butterflies could we realistically expect with such technologies being introduced on a large scale ahead of OTL. (Let's assume for a moment that it still follows history in VERY broad strokes... Example: Two massive globe spanning industrial conflicts, a decaying power falls radical revolution, reactionary ideologies emerge and the rise of conflict similar to the OTL cold war.)
- 19th century: steampunk
- Early twentieth century: dieselpunk
- Mid twentieth century: atompunk
- Late twenties century: cyberpunk
Now the second part would be what kind of butterflies could we realistically expect with such technologies being introduced on a large scale ahead of OTL. (Let's assume for a moment that it still follows history in VERY broad strokes... Example: Two massive globe spanning industrial conflicts, a decaying power falls radical revolution, reactionary ideologies emerge and the rise of conflict similar to the OTL cold war.)