looks like it made by a german company ASB glass floor.
https://asbglassfloor.com/
as an architect, my first concern would be show us the testing so that we know it is as safe as our conventional floor.
If I owned the Celtics, I would want that info, and years of use in other locations before I put my multi-million dollar bball all stars on it.
And how does that glass sheet react with a layer of ice underneath it?
oh yeah of course, duh....
i saw one video that said there are a series of springs in one version of the floor.
The website isn't helpful at all honestly. there has to be a laundry list of specifications for the installation and use of the floor, none of that on the website.
That always makes me a bit skeptical as an architect. IE, why do I have to call you to find out the true details of your floor system? If it is completely vetted, tested, approved, just post your information.
Some of the interviews where it was used for handball had positive responses from the players, but what about as a basketball or soccer floor? completely different uses.