That's true, it does look very realistic even over the somewhat uneven bricks. Good on them to be up-front about its real performance and not conceal that in the video, but I think they could've done more to show us some more hard-surface footage, especially considering that's Hobbyking's own...
There was a 1/110th scale "Zubr-class" hovercraft model on Hobbyking, can still find it on Aliexpress. I loved the idea of an RC hovercraft as a kid, they are the perfect demo toy for an indoor mall.
It seems to lack the power to hover over water, instead just kind of floating and blowing...