Well I'd agree we don't want exact human clones. But then the majority of people don't want the complex to use computers we have at the moment. Moving from serial to parallel won't make the computer any easier to use or reduce the learning burden on the user. The beauty of interacting with a human is that you don't need to know the fine details of how it works on the inside to get it to do what you want, even if it didn't have the ability to do the task previously. This aspect of the human brain would be very beneficial if we can get computers to have it (assuming it doesn't lead to negative singularity, extinction of the human race etc).