It's arriving right now. I can speak in plain English to my smartphone (or any other language really, it knows more human languages than I do), cars drive themselves, the world's billionaires are now focused on rapid AI development, etc. There are so many things different this time around that you shouldn't be so pessimistic. "It's different this time" (it actually is though)!

I am optimistic, but there were dolls capable of playing musics back in Medieval Age, I feel like e.g. Siri is one of those things.

The difference to me is that the dolls capable of playing music were made up of a small set of parts compared to 15 million lines of code for Wolfram Alpha. We are way more sophisticated today.

You chose a bad example. Wolfram Alpha is like 15000 of such dolls. Not an AI in any way though.

I had legos when I was a kid. The Burj Khalifa is pretty much just like that.

Pretty much. It's not like it is 3d-printed, robot-assembled or "grown" in a semi-biological way.

These are indeed improvements, but I don't think they qualify as true AI. Software is still nowhere near being able to pass the Turing Test. We still don't have any idea how the human mind works, or how to emulate one digitally.

The circumstances are now better than they were ten years ago. Software has improved.

Isn't it a bit of a disservice to the hardware side to say that just Software has improved? Think back 10 years, 2004...would the Nest have been possible? How about Google's self driving car? I think these things go hand in hand.

Somewhat, but keep in mind that for a hard problem (and AI is a very, very "hard" problem, software is going to be the bottleneck to thinking machines.

Also hardware is way faster.