Cables can be quite a lot considering how many devices a person uses, but if the cables were made into wireless with two parts A and B, basically a transmitter (automatically rechargeable), it would definitely be better and have a cleaner room containing little to no cables.
Nintendo forgot this one for Wii U, er, guess they're not all that innovative. :P
P.S.: The LAN cable is still far better than a WiFi connect due to stability (rarely ever drops) and security.