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.

Cadillac's first-all electric Escalade has a big battery, big range, big equipment list, and a big price. But is it a little disappointing on the road?