According to Google Travel we are now looking at 5 stages of Travel.

Dreaming: 68% of business travelers watch travel-related online videos. Among them, 68% are thinking about a trip
Planning: The average traveler visits ~22 travel related sites during 9.5 research sessions prior to booking
Booking: 37% of leisure travelers report that the internet prompted them to book, up from 28% two years ago
Experiencing: 70% of business travelers check into their flights/hotel with their mobile device. Almost 1 in 4 hotel queries come from a mobile phone
Sharing: About 1 in 3 business travelers have posted reviews online of places they’ve been
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