I agree with you 95%. The 5% being an admittedly far fetched and idyllic notion that just maybe one day we will design the mythical x86 bacterium and all of a sudden instead of needing meticulously crafted silicone wafers and logic gates... all of a sudden all we need is cheap simple hydrocarbon to grow the world's most elaborate super computers. They wouldn't be faster but more efficient and highly parallel. Like a more distributed version of a brain where bacterial (or whatever) cells take the place of traditional neurons.