Maybe that's because it's hard to be optimistic about the future starting from now? The worst case is that the environment goes to hell and we die, or the economy crashes and life becomes hell, or killer robots kill us all (at the behest of some state actor or just because they loooove paperclips). The best case is we get humans to not behave like humans (so some people are less miserable), and then we either upgrade ourselves into unrecognizable transhumans or we become pets to transhumans or incomprehensible AIs.
> To a considerable extent, futurism is still stuck in the 1960s. What passes for futurism today is a minor tweak on the present.
Maybe that's just because we've picked most of the low hanging fruit that we could see in the '60s, and what remains still feels pretty far off? The best possible future that we can hope for can be summed up as "now, but don't fuck it up."