I'm a huge fan of ICE vehicles. In the interest of fairness I feel obligated to point out that electric motors are far more power dense than any mass produced ICE. Motor technology really could freeze forever and they would still be amazing.

Batteries can have any power density you want its really more of an aspect of pack design.

The only defficiency of EVs is the energy density of batteries.

Motors: high power density

Batteries: medium to high power density, low energy density

ICE: low to medium power density

Gasoline: high energy density