Don't know many laptop users do you?

You must only know gamers. Mobile professionals love hibernate.

You walk into a meeting with clients, and within 30 seconds you have the presentation up, you can switch to web pages already open to specific pages, documents opened and highlighted. You look unprepared when you have to boot Windows, search for the presentation, fire up the browser and go to bookmarked pages. Sure you could fill that time with talk, but it still looks unprofessional.

Sleep works, but as it sucks up battery, those who travel prefer hibernate.