I'm kind of fascinated by any type of accelerator chip for some reason - I think it has something to do with the design of the computers I had when I was a kid

I'm kind of fascinated by any type of accelerator chip for some reason - I think it has something to do with the design of the computers I had when I was a kid i.e. Spectrum, Amiga etc which had dedicated chips for particular facets of the functioning that became iconic. I would love to do something with FPGAs and am certain their potential is massive, but struggle to come up with a use case that seems in any way novel, and I don't really want to just build my own VGA controller, get bored, and stop there!