Electric karts have far more torque than gas counterparts....even without the noise, the thrill will amaze most anyone. There is still noise from the motor as well as tire noise. Anyone who has been to a K1 go kart facility will certainly understand. My career is in racing, and I also race as a hobby, and my son races gas go karts. I can tell you without a shadow of a doubt, we prefer electric race karts over the gas karts at tomorrowland speedway(but we still enjoy them none the less).
The biggest issue I see is the shear volume, the karts would need a constant power source as opposed to a battery system.
It would certainly need a limiting rail like the current cars, as allowing free range will cause inadvertent crashes and traffic jams. I do think Tron could be a good fit for the theme, though Wreck it Ralph theme could support racers, but I'm not sure that fits tomorrowlands theme.
