As someone who travelled for work before and after smartphones, absolutely. You couldn't just open Google Maps, search a business and go there, the problem wasn't going city to city, but finding a specific place in or outside a city. If you got a request to go to X business either you already knew how to get there, or it would take some planning.

Nowadays my company can receive a request from a customer in another country, and in 1 hour they can plan the trip, reserve the rental car, book a plane, book an hotel for the night. That just wasn't possible in the past.