I'm looking forward to the day when every device uses wireless to communicate with other devices. I have 10 computers, 4 displays, 2 printers and other devices in my small home office with a sea of wires everywhere. It's a nightmare. As you have hinted at, manufacturers do a poor job of labeling wires and ports. Power bricks and AC adaptors also get me frustrated. I've accidentally blown devices because the polarity is reversed on some adaptors (cheap Chinese stuff).
Apple is good, mostly USB and Firewire. And you can buy wireless speakers, I've got a pair and there's no unsightly wires to deal with.
I had them in my clinic a few years ago and the key boards and mice “talked” to the computers in adjacent treatment rooms.... BIG but sometimes funny messes with that!
I should try them again. The technology may have improved.
Apple is almost completely there. The standard iMac keyboard and magic mouse are both Bluetooth my network is WIFI and my printer is WIFI. As is my AppleTV The only cable that comes to the computer is the power cord and a FireWire connection to my backup drive. If I connect my drive to the WIFI router by USB even that cable could be deleted from my desk. In other word, it's even better than this, now, no keyboard or mouse cable:
