While the flip is technically very impressive (assuming they can reproduce it live) I can't see any real world scenario where any of this stuff is remotely useful.
How is the fan going to cope with the debris on a typical road?
How is driving around in close proximity to high pressure gases not an accident waiting to happen?
Given Musk's track record on fulfilling his promises, I'm not holding my breath that it is ever going to make it onto a race track. Let alone beat every track record.
The full aerodynamics package version (aka the flying car) is invite only and apparently mostly for show. But the basic suction fan and gas thrusters version for acceleration will definitely make people go crazy on race tracks. Imagine a Top Fuel dragster-like acceleration in a car that can go more than 1000ft. Heck, if they set up a real league with this, it might get me back into watching motorsports for the first time in a decade.