The big SUV is a step in fulfilling Cadillac's vision for an all-electric lineup of "tier one" luxury vehicles.

Some details remain untested for now, the most obvious being how close the Escalade IQ will be able to get to its claimed 460-mile range in the real world. The 8000-pound tow rating invites some testing too, also the question of how using it will affect the achievable range.

The Escalade IQ is smarter, it turns out; A big battery delivers 460 miles of range; Cadillac delivers a big price,