Why GMC's new electric Hummer is a bigger deal than Tesla's Cybertruck

There were no broken windows, like the "bulletproof" ones at Tesla's Cybertruck event last year that promptly shattered under pressure, but the GMC Hummer EV reveal Tuesday night was one of the biggest moments for electric vehicles yet. 

Let's back up. Last year, Tesla's announced its Cybertruck, the revolutionary EV...