Likewise, this would be enough to replace my cell plan. I don’t need high bandwidth stuff, just text communications, PagerDuty, gmail. The rest I can do over Wi-Fi.
Given the price per bit per second per square meter, I'd be surprised if this will be more economical for operators to provide in anything but the most rural areas.
Maps can be downloaded offline and directions calculated locally. Only really need updates for traffic (which could be broadcast, which I think some old gps receivers had)