Now wouldn't it be nice if there was a standard so all power cords connected to the same side on the rear on every piece of rack-mount A/V and IT gear? And if they all had IEC connectors instead of a built-in 10 ft. long power cord (as seen on some UPS rack-mounts). Then all of the power could be run on one vertical PDU, on the one side, with very short power cords.

But that will never happen. So, lacing bars are the way to go.

BTW, it would also be nice if there was a standard for low-voltage power supplies for rack-mount equipment. So many voltages! So many connectors! So many wall-warts! So little time!