Ask HN: Are there any basic material breakthroughs that impacts construction?

I have searched for this topic a lot but never been able to find concrete evidence. Has there been fundamental breakthroughs in material science coupled with the ability to scale the applications in production that will see the day of light in the next decade or 2.

Examples:

1. Strong materials that can improve strength or reduce weight 10x or more and can help us build new cities from ground up. 2. Materials that can literally be synthesized from other relatively cheap and abundant raw materials and lower in cost than compared super materials.

There was so much promise around Carbon nanotubes/ graphene etc. more than a decade back but to my layman's eyes it does not look there has been much impact in areas mentioned here.

Having said that do the laws of physics limit us from making such materials. Will we ever see tall buildings with connected bridges and expressways floating in air before 2050 ?