There's more to the Moore's law argument than the one prediction from Kurzweil. For example there's Hans Moravec's essay from 97 predicting "the required hardware will be available in cheap machines in the 2020s" and I remember writing about the stuff for my uni entrance exam in 1981 before I'd heard of Kurzweil or Moravec.
The basic idea is that when brain equivalent hardware is available cheaply so hackers can hack on it, the software will follow not long after if not before. Given the recent progress and the sheer number of talented people flooding into AI research that seems quite likely to me.