Those don't follow from each other, though. Handheld wireless computers were purely speculative until the 2010s, but that doesn't mean we were on the brink of figuring out teleportation.
People have been assuming computers would yield AGI since we first made an electric calculator. First through sheer processing power, then through improved computation techniques, then neural networks. Figuring out speech and vision are probably part of that process, but AGI does not arise from them without an indeterminate, possibly unknowable amount of major steps.
And as for world-ending threats, how about we get past, say, Trump, Putin and all the natural general intelligences that are very real and in the process of doing the same first? Or, you know, we apply that level of concern about tech that we do have, like social media disrupting democracy, private universal surveillance or digital oligopolies driving endless inequality? Or, hey, global warming.
I agree rogue AI is a much cooler problem to speculate about, which is why we keep writing sci-fi about it, but we have more pressing issues.