Who uses a travel agent these days? It is pretty amazing to realize that in the course of a 10-year span, the Internet and the cornucopia of travel sites (Travelocity, Expedia, SideStep, etc.) has made this service provider an endangered species. With the byzantine pricing levels, and hugely complex travel packages, the idea that the travel industry could be automated seemed unlikely.
As a travel agent, you made your commission by culling a database of information that was generally unavailable to the public. Saber was one reservation system that was widely used by travel agents. When Travelocity launched using Saber's information, the die was cast. If a consumer can view the same prices from Travelocity with the numerous iterations and options, just like a travel agent, then why do you need the travel agent? It appears that you don't.
The concept of opacity of data creating business advantages between those with the superior data, versus those without, is well explained in many excellent books such as the Tipping Point and Freakonomics. The Internet is a perfect case study of what happens when you remove this opacity and present this data to consumers. Travel is particularly relevant as unlike retail and industries trading physical goods, the impulse buy and logistics issues do not provide bricks and mortar locations a protective barrier against the Internet equivolents. Industries trading in physical goods have had their pricing and profit margins impacted by the Internet e-tailers, but are not as prone to extinction as service providers whose knowledge advantage is compromised by the Internet.
Industries that have been conquered or have been dramatically changed by the Internet:
Travel - (by Travelocity, Expedia, SideStep, TravelZoo, etc.)
Computer Resellers - (by Dell.com)
Books - (by Amazon.com)
Collectables - (by eBay)
Advertising - (by Google)
Newspaper Classified Ads - (by Craig's List)
Retail Stock Trading - (by eTrade, Charles Schwab)
There are huge service businesses that trive on opacity and the knowledge gap. Real estate, finance, and employment are all industries that are huge money-makers and require a huge base of knowledge experts. The challenge with these industries is that the inventory is highly fluid and unpredictable, and information needed to make an informed decision is highly perishable. The mayor of New York built a nice little business on the ability to provide financial data a few minutes faster than other media sources. The staffing industry requires a huge number of account manager and recruiters in order to deal with perhaps one of the most volatile products you can work with - humans. Then there is real estate.
When you talk with real estate agents, they claim that there is NO way that the process of buying and selling a house can be automated. Zillow has over $50 million ways to try and address this issue. Other Internet companies are also looking at the real estate market. "We will always need real estate agents," they claim. I am not so sure. Sounds a lot like what travel agents were saying back in 1995.