One nice thing is bluetooth pairing.

I bought a pair of Bose QC35 headphones recently. There is an NFC tag embedded in the headphones. I just had to tap my phone to the headphones and hit an "accept" button on my phone, and they were paired.

Similarly a friend has a box plugged into their stereo that's essentially just an A2DP receiver with RCA outputs, and has NFC on it for pairing. I wanted to play some music on his stereo at a party, and all I had to do was tap my phone to the receiver and start up Spotify.