There are still tons of people who will actually pick up the phone and waste their time calling around about car reservations and hotel reservations, when they could easily book them online, without any phone calls, and be on their way. The method is still the same, with the exception that you do not have to wait on hold, talk to a representative and then tender your credit card information over the phone.
Rather, with online car reservations, you can easily choose the car that you want by looking through detailed pictures of the available rentals. You can decide what features you would like—like a GPS unit, or a mid-sized sedan—simply by selecting options on the website. No more do we have to call around for car reservations or hotel reservations. There are even many travel websites that will book all aspects of your trip, and all from one place. The future is now; phone calls for hotel and car reservations are obsolete.
So before you wast an hour on the phone, get the same thing done in ten minutes online.