A city using AI, that sounds huge and like you rightly said, too good to be a real project. You also made a very good point, there have been little or no success with AI projects at least none that I know of, so I wonder why Investors are still going for such when it is evident the idea isn't workable. It is always good to take out time to analyse the idea any project is bringing to the table and it is through this way will the truth be discovered, that is, if it will work on blockchain or not, therefore if it won't work that is to say any investment done is likely to be gone. In the same way, most of this projects comes with hype which ends up covering the true nature of the project, therefore at all times, due diligence is needed.