Mobile Enterprise is already the next big thing and is only going to get bigger and better with continued improvements in cellular and handheld technology.
Accessing your business from anywhere and conducting business from anywhere is not just productive, it's a competitive edge that small business and entrepreneurs must have. Applications like Stripe that allow taking payments at the point of sale are solid concepts, like a cell phone years from now, we'll wonder how we ever did without.
From the tech start-ups pouring into this arena to corporate giants trying to keep market share, the mobile enterprise industry represents the bleeding edge of tech with a real purpose. Enough of the social kid toys already. If you haven't already, check out Stripe. (A real domain name too, not like SomethingICantRemember.whatever)