I'll join the chorus and say that at no airport, DTW and LAS included, have I been instructed to use separate bins for small electronics. One does have to allow an un-stacked view of a laptop, DVD player, or video camera, but all other devices can be left in the carry-ons. This is not to say that a plethora of devices won't result in a hand-screening (an associate of mine was held up while they took a closer look at his shaver, of all things), but there is no requirement to separate them. Unless you get a cranky TSO on a power trip.