I don't want an hoverboard. I want an hovercar. Replace roads with a sheet of copper and put grass over it.
In England there is a scam where builders go door to door offering to fix your driveway. Part of the scam is offering to do it cheap because they have some left over asphalt from a large job and it needs to be used quick.
They then do a terrible job with the stolen asphalt, but cosmetically it looks okay so the householder pays and the crooks leave.