They are actually doing that on cell phones, even between the same manufacturer, Motorola, I have had 4 different chargers, the newest one on the V750 is even smaller than the one on the razr and 755. Now I have 5 razr/755 chargers and two data cables I can't use on my 750 unless I buy the adapter dongle for $10 each.
I'm going to put all our wall wart phone/headset chargers, 6, on a power strip and turn the thing off every morning.