The empeg would be able to control the device's hanging off of the router.

No, the router would be able to control the devices hanging off the router.

So the devices attached to its usb are controlled over Ethernet.

I don't see any indication that the makers are thinking of implementing that; certainly it would make no sense for that device's primary function (router over a USB cable modem).

This isn't the droid you're looking for.

Peter