No it really wont.
Nope sorry not revolutionary at all, won't save fuel and won't pollute less.
I had an electric supercharger on my 2004 evo 8 back in 2004-2005.
It was created and to act as a device to help the low end tq and help pre-spool the turbo.
It was on my car while it had the factory turbo and an AVO turbo kit that made use of a turbo in the GT30 family.
The electric turbo was a huge paper weight. It did very little to pre-spool the gt30 or factory evo turbo and would easily get drowned out one the main turbo started to come online. Gas mileage didn't improve. Anyone that is familiar with tuning knows that spooling/adding more air = gas is needed. So even with a low positive psi the engine is having air added into it (getting lean) and more fuel is needed to counteract the leaning effect of adding more air. Since you are adding more gas due to more air you technically are doing the opposite of not polluting. :-P lol
It's funny that people are still attempting this. By the time I started getting active in the evo community shiv/vishnu was toning down his presence in that community but I figured he would have been aware of my car and its electric supercharger days. From one evo OG to another I was really surprised to see him revisit this idea as it didn't go down to well back in the day.
If you want faster spool all of these does a better job:
Anti-lag
Timing changes
Timing changes with respect to your (no lift shift) settings
Cams
Larger throttle body
Larger intake manifold
More displacement
-the previous 4 hint at better air flow in the system
-more air in = more exhaust gas to spin turbine = earlier spooling
-earlier denser air introduced in the system is the idea the E-turbo is based on in its relation to pre-spooling.
Though I must add that electric motor and battery technology has improved in the past 14 years. But in relation to a car like the evo or brz you are still limited by battery/recharging options. At the moment the best application for an E-turbo would be in a hybrid car. The E-turbo would benefit from the larger electrical potential those cars due to their batteries and recharge rates. Imagine if one to electric hub components which spins the wheels on a koenigsegg regara or mclaren p1 was focused into a spinning turbine application... it would prove to be a fun little hybrid hack to play with. (think civic hybrid with an electric powered gt35 intake wheel shoved into the intake system. You could literally flip a switch to go from turbo lag save my drivetrain characteristics to supercharger 100% on all the time beast mode characteristics.