The other issue brought up was that we only size general lighting circuits to the square footage of the home, not by the number of outlets.
Whether the number (3va per sq/ft)is right can be argued but I think the logic is sound. People are going to put the same equipment in a room, regardless of how many outlets there are. The issue addressed is making sure there is a safely available place to plug it in without extension cords or cords crossing walk ways.
Certainly there are a few power hogs that can be plugged in like space heaters and vacuum cleaners but most things actually use negligible amounts of power. I have an entertainment center with a TV, a PC, 2 satellite boxes, a DVR, TV amp, lights, ethernet switch and a number of other "wall wart" type equipment on 2 UPS units. There are at least a dozen things plugged in. Total draw is less than 6 amps with everything going.