Adsense Marrying Indian Railways Ticket - Cool Idea!

Ever since I read Wikinomics and Naked Conversations, weird ideas come visiting my head sometimes. When I was waiting for a train at Ernakulam Railway Station, I was watching a fellow passenger looking at his ticket. Came an idea, how cool it would be, if all train tickets stationary have a dynamic ad printing logic like Adsense, which would analyse the to and fro location and the demographic information already available on the ticket. For instance, a train ticket for Ooty purchased by two students in Chennai would print ads of suggested locations of tourist interest in Ooty. A train ticket of a couple heading for Varanasi, would print ads of Saree Shops in Varanasi, and for a very old couple carry ads of easy to locate Hotels near Sankatmochan temple. This, rather than the standard ads that come on the ticket stationary. And depending on the class of ticket purchased, an a hint of the passengers buying power can be gleaned too - all operable marketing information. Imagine how cool the idea would be from a marketing perspective.

Is such an idea likely to be a reality in the future or am I spending far too much time on the net?!