Last I heard, the option for citizens in cities were disabled on 32-bit systems. We'd need confirmation that the option is still available on 64-bit Windows.
as far as I know, this is the case. 64bit get pedestrians and 32bit do not. Very annoying because my 32bit machine could run them...though I do understand that not everyone's could.
Still would really like the option to toggle on/off pedestrians.