I am starting my first raspberry pie project and I am essentially going for a entertainment center. I ordered a 2.5A power adapter to provide power to the unit, but was wondering if it was possible to power the unit using USB or some alternate way. Because the unit will be connected to the TV at all times, I would like to minimize on the number connections to the wall for power - if at all possible. Will this require a separate set up / installation / any special hardware?

I appreciate any suggestions.