We are far, but not as far as our brains are wired to think. Technological development is exponential, whereas our brains are wired to think linearly. Think back 10 years ago; how much has changed since? Think forward 10 years from now, and realize that upcoming technological development will be, if Moore's law holds up, at least 4 times that amount. 2045 also happens to roughly coincide with what Transhumanists call "the Singularity"--that is, the moment in which one computer will surpass the computational power of all of humanity's brains together. So I think it is very achievable within that timeframe, if we aren't destroyed by AI by then, that is.