That's the idea being chattered about in venture capital circles, and the chatter is becoming much louder after the leak of some recent financials from Uber that show it could be on track to make over $200 million in revenue this year.

How could a car-hailing app be such a huge and revolutionary idea that it could trump Facebook in value someday, you ask? Because the company is very rapidly positioning itself as much more than a car service, it sells something actually very useful, and it's expanding with remarkable speed.

As NY Mag discusses, Uber recently switched its tagline from "everyone's private driver" to "Where lifestyle meets logistics," signaling the broad scope of what may be to come. Another signal: that Christmas tree delivery stunt last week. And the earlier Tamale Lady gambit. In order to grow, Uber appears to be preparing to do for on-demand, mobile-app delivery what Amazon did for the online sale of everything. Amazon, as you may remember, was just a bookseller once upon a time, and now they are a huge cloud- and web-hosting service in addition to being the world's biggest portal of all things retail, not to mention a viable competitor for Netflix.

Uber is now in 29 U.S. cities, 60 cities total in 22 different countries as of this week, and they're on track to quadruple their staff by March from the number they had last March. Also, they just lined up financing to offer low-interest car loans to 200,000 new UberX drivers, essentially locking all those drivers in to their workforce for the life of those loans.

There's also talk in nerd circles of the efficiency and cheapness of Uber and UberX eliminating the need for personal vehicles altogether. Then there's the "death of the ownership economy" on a larger scale, where you can get things like a grill, or a trampoline, or a pinball machine delivered by Uber for use at a party, and it could then be picked up by them the next day, eliminating all kinds of hassle and expense.

Basically, they may be taking over the world soon. Just wait.

[NY Mag]
[Bloomberg]
[Valleywag]

Previously: Uber, Now in 29 U.S. Cities, May Gross Over $200 Million This Year