I just wish there was a way to get 12V & 5V at ~1A in addition to the 110V outlets in my house, supplied by a large transformer in my basement. That way I could

I just wish there was a way to get 12V & 5V at ~1A in addition to the 110V outlets in my house, supplied by a large transformer in my basement. That way I could avoid wall-warts for all my electronic devices like my router, usb hub, phone charger, etc... Even better would be a standard for 12V at 5A or 10A or something, to power all the other electronics in my house, like monitors, DVD players, etc, that have built-in transformers. But I'm not an EE, so maybe the losses from dozens of feet of low-voltage in the walls outweighs the efficiency gains from having a single large transformer...