All joking aside about LEDs being the future, there really is a huge future in learning about LED lighting technology. Specifically, in my case as an electronics engineer. This may seen a little boring(it may get repetitive), but it could be the basis for a good small business. It would specialize in custom LED based lighting solutions. This could be for either architectural or entertainment lighting.
Right now I am researching different ways of efficiently driving(powering) LEDs. I found this lighting app note from Cree that looks like it might be useful. http://www.cree.com/products/pdf/LED_Luminaire_Design_Guide.pdf