Here's how I think about "accelerationism".
At any given historical moment you have forces of production - that's what we're able to do and make, what powers we have to transform ourselves and the world around us through labour and technology - and you have relations of production - that's how the use of those powers is actually organised, how work is allocated and goods are distributed.
At our particular historical moment, the available forces of production are staggeringly powerful - in terms of raw productive capability, we could feed the world, solve climate change, reverse the destruction of the biosphere, provide universal healthcare, build gleaming cities with elegant public parks and monuments, and so on. Doing all of that doesn't even require a massively speculative bet on futuristic powers of automation, like self-driving cars or robot baristas. It does however require levels of co-ordination that our current relations of production - capitalist societies and economies, organised into nations with international trade and multinational corporations - simply don't support.