It looks like a concept sketch; I don't see any way you could fit a sufficiently powerful motor and power supply in that space-- and even if you could, heat and

It looks like a concept sketch; I don't see any way you could fit a sufficiently powerful motor and power supply in that space-- and even if you could, heat and noise would still be a large problem. In other words: I suspect it's from the same folks who promised us all flying cars and hoverboards...