Wi-Fi, or Bluetooth? It's a question that most audiophiles have answered resoundingly when it comes to wireless sound: Wi-Fi, of course. Uncompromised fidelity (from the original audio source), more stable connection, fewer interruptions, and did I mention fidelity? In the last year or two, though, we've basically seen Wi-Fi speakers pushed into a corner of the market, as a niche product, while ever more ubiquitous Bluetooth speaker systems have taken the lead.
The reason for this is quite simple: Wi-Fi is hard, Bluetooth is easy. And not just in the setup sense, but in terms of actual audio playback. Wi-Fi speaker systems, like the well-known Sonos, are basically limited to whatever kind of functionality Sonos decides to implement as part of its player software.