There are innovations that tend to make wiring easier. For one, you got those 'backstab' connections found on many newer devices. No need to loop a wire around a screw, making sure it goes in right direction. Instead, you strip about 1/2" of insulation and poke the wire into a hole on an outlet or switch. If neded, wire can be released by pressing on a tab.
Then, I see fixtures coming out that have a connecting module. Instead of holding entire fixture while connecting wires, attach a small module to the box and wire it - then snap the fixture onto the module. Very convenient.
However, for flexibility of connecting disconnecting and capping off wires, I am yet to see anything beat the wirenut.