so what?
When you want to estimate something, you look at trends. If the estimate is not close you don't say the estimaters are bad.
Making a brain is hard. It took nature 4 billion years, give or take, and she's a lot smarter than we are (or at least she has a lot more monkeys banging on typewriters than we do). The humans who have attempted to duplicate this feat are great and good people. Very smart. They deserve praise for their efforts. It is good research and it had to be done.
And yes: increasing computing power is a benefit to this pursuit.